Southern Oscillation Index
The Southern Oscillation Index (SOI) measures the pressure gradient across the tropical Pacific which, in turn, is an indicator of equatorial wind variations.
When the SOI index reaches low negative values, a strong El Niño (warming of surface water in the eastern equatorial Pacific) is in progress.
High positive values indicate La Niña (cooling of surface water in the eastern equatorial Pacific).
When the SOI index reaches low negative values, a strong El Niño (warming of surface water in the eastern equatorial Pacific) is in progress.
High positive values indicate La Niña (cooling of surface water in the eastern equatorial Pacific).
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 1876 | 11.3 | 11.0 | 0.2 | 9.4 | 6.8 | 17.2 | -5.6 | 12.3 | 10.5 | -8.0 | -2.7 | -3.0 |
| 1877 | -9.7 | -6.5 | -4.7 | -9.6 | 3.6 | -16.8 | -10.2 | -8.2 | -17.2 | -16.0 | -12.6 | -12.6 |
| 1878 | -8.7 | -21.1 | -15.5 | -8.8 | 2.1 | -3.1 | 15.9 | 13.0 | 17.7 | 10.9 | 15.1 | 17.9 |
| 1879 | 12.7 | 14.3 | 13.2 | 12.7 | 2.1 | 16.4 | 21.8 | 22.6 | 18.9 | 15.2 | 9.8 | -5.5 |
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 1880 | 10.8 | 7.7 | 14.3 | 5.3 | 12.3 | 9.1 | 1.6 | 14.3 | 8.1 | 4.8 | 7.2 | -1.9 |
| 1881 | -7.3 | -5.5 | 1.8 | 0.3 | -4.3 | -4.7 | -5.6 | -11.4 | -13.6 | -23.9 | 7.2 | 9.8 |
| 1882 | -6.8 | -1.3 | 5.1 | 1.2 | 6.8 | -12.0 | -21.3 | -25.6 | -14.8 | -2.5 | 2.6 | 10.3 |
| 1883 | 6.0 | 9.1 | -25.3 | 14.4 | 13.9 | 3.4 | -10.2 | 1.4 | -8.2 | 4.8 | 5.2 | -15.2 |
| 1884 | -12.5 | -5.0 | 9.4 | -15.4 | 1.3 | 9.1 | -3.0 | -5.0 | -7.0 | 4.2 | -1.4 | -12.6 |
| 1885 | -16.3 | 1.6 | 5.1 | -0.5 | -4.3 | -14.4 | -5.0 | -9.5 | -4.0 | -17.8 | -15.9 | 5.2 |
| 1886 | -0.6 | 1.6 | 2.9 | 4.5 | 6.0 | 5.0 | 7.4 | 13.6 | 13.5 | 13.4 | 10.5 | 14.4 |
| 1887 | 12.2 | 11.0 | 10.0 | 9.4 | -4.3 | 5.0 | 4.8 | 4.6 | 5.1 | 4.8 | -5.3 | 5.2 |
| 1888 | -3.0 | -2.2 | -11.7 | -23.6 | -9.8 | -16.0 | -16.7 | -8.9 | -9.4 | -14.7 | -12.6 | -2.4 |
| 1889 | -25.9 | -1.7 | -27.5 | -0.5 | -1.9 | 22.0 | 1.6 | 2.1 | 11.1 | 4.2 | 23.0 | 22.0 |
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 1890 | 20.8 | 11.0 | 14.3 | 6.9 | 3.6 | 5.8 | -2.3 | -3.1 | 9.3 | 3.6 | 2.6 | 0.6 |
| 1891 | 15.6 | -3.6 | -9.5 | 4.5 | -0.3 | -1.5 | -6.3 | -8.9 | -10.6 | 0.6 | -4.7 | -4.5 |
| 1892 | 2.7 | -10.2 | 11.1 | 6.9 | 10.0 | 19.6 | 7.4 | 5.9 | 6.3 | 8.5 | -0.7 | 3.7 |
| 1893 | 11.3 | 7.7 | -1.4 | 1.2 | -3.5 | 10.7 | 14.0 | 7.8 | 5.7 | 7.9 | 2.6 | 1.6 |
| 1894 | 17.5 | 10.0 | 5.6 | -3.0 | -5.1 | -1.5 | -2.3 | -5.7 | -1.6 | 1.8 | 7.2 | 0.1 |
| 1895 | 5.6 | 3.0 | -0.3 | -7.1 | -8.2 | -4.7 | -0.4 | -6.3 | -4.0 | -5.6 | -8.6 | -3.5 |
| 1896 | 1.3 | 4.9 | -6.3 | -8.8 | -42.2 | -30.6 | -20.6 | -22.4 | -19.0 | -19.0 | -11.9 | -14.2 |
| 1897 | -12.5 | -7.4 | -16.6 | -17.8 | -16.9 | 0.2 | -2.3 | 0.8 | 0.2 | 1.8 | -8.0 | 10.3 |
| 1898 | 7.0 | 6.3 | 19.2 | 11.1 | -1.9 | -2.3 | 6.1 | 2.1 | 3.2 | -0.7 | -2.7 | -0.4 |
| 1899 | 13.2 | 9.1 | 13.8 | 4.5 | -7.4 | -10.4 | -5.6 | -10.1 | -1.6 | 6.1 | 15.8 | -3.0 |
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 1900 | -7.3 | -6.5 | -25.3 | -18.7 | -7.4 | 26.1 | 10.0 | 7.8 | -16.6 | -17.2 | -6.0 | -5.5 |
| 1901 | -0.1 | 3.0 | 9.4 | 4.5 | -0.3 | 19.6 | 14.6 | 9.8 | -16.0 | -22.1 | -8.6 | -1.9 |
| 1902 | 17.0 | -2.2 | 11.6 | 7.8 | 7.6 | 2.6 | 1.6 | -8.9 | -17.8 | -7.4 | -3.4 | -3.0 |
| 1903 | -9.2 | -10.2 | 17.6 | 17.7 | 7.6 | -0.6 | 6.1 | 0.1 | 8.7 | 4.2 | 1.3 | 15.9 |
| 1904 | 14.1 | 16.2 | 9.4 | 31.7 | 9.2 | -7.1 | -8.9 | 0.8 | 0.2 | 1.2 | -17.2 | 2.6 |
| 1905 | -9.2 | -16.8 | -30.2 | -42.6 | -37.4 | -31.4 | -21.3 | -7.6 | -7.0 | -5.6 | -17.9 | -13.1 |
| 1906 | -3.5 | -7.4 | -5.2 | -8.8 | 1.3 | -3.9 | 6.8 | 15.5 | 18.3 | 9.1 | 21.7 | 4.7 |
| 1907 | 5.1 | 1.6 | -0.3 | 4.5 | 10.0 | 8.3 | -4.3 | -8.2 | 0.2 | 0.6 | -2.0 | 8.8 |
| 1908 | -10.6 | 7.7 | 0.2 | 16.8 | -1.1 | -2.3 | 2.2 | 5.3 | 17.7 | 7.9 | 2.6 | -5.5 |
| 1909 | -2.5 | -3.2 | -0.3 | -14.5 | 2.1 | 22.8 | 10.7 | 9.8 | 0.8 | 4.2 | 9.2 | 4.7 |
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 1910 | 5.6 | 15.2 | 12.7 | 5.3 | 0.5 | 22.0 | 20.5 | 9.8 | 15.3 | 10.3 | 19.7 | 15.9 |
| 1911 | 3.2 | 1.6 | 3.5 | 2.0 | -8.2 | -12.0 | -12.8 | -12.1 | -8.8 | -11.7 | -7.3 | -1.4 |
| 1912 | -9.7 | -17.3 | -9.0 | -21.1 | -13.0 | -6.3 | -0.4 | -7.6 | -4.0 | -8.0 | 2.6 | -8.0 |
| 1913 | -3.5 | -5.0 | 1.3 | -6.3 | -8.2 | -3.9 | -1.7 | -7.6 | -9.4 | -9.2 | -11.9 | -7.0 |
| 1914 | -5.4 | 2.0 | 9.4 | -14.5 | -0.3 | -16.8 | -18.0 | -17.2 | -12.4 | -8.6 | -11.9 | -1.4 |
| 1915 | -21.6 | -2.2 | -20.4 | -17.8 | -12.2 | 6.6 | 14.0 | 7.2 | 7.5 | 2.4 | -14.6 | 9.8 |
| 1916 | 5.6 | -3.6 | -6.3 | -0.5 | 6.8 | 9.1 | 25.7 | 16.2 | 4.5 | 6.1 | 9.8 | 15.4 |
| 1917 | 5.1 | 10.0 | 18.1 | 21.8 | 21.8 | 21.2 | 28.3 | 34.8 | 29.7 | 15.2 | 21.0 | 22.5 |
| 1918 | 14.6 | 16.6 | -2.0 | 16.8 | 10.0 | -4.7 | -14.1 | -4.4 | -8.2 | -5.0 | 1.3 | -8.0 |
| 1919 | -14.9 | -11.2 | -12.8 | -3.0 | -7.4 | -10.4 | -8.9 | -6.9 | -5.8 | -10.5 | -11.3 | -9.1 |
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 1920 | 1.8 | -1.7 | -4.1 | 0.3 | -2.7 | 6.6 | 9.4 | 5.3 | 5.1 | -4.3 | -0.1 | 9.8 |
| 1921 | 10.8 | 6.7 | 8.9 | -7.1 | 2.1 | 22.0 | 2.9 | -6.9 | 5.1 | 9.7 | 8.5 | 8.2 |
| 1922 | 8.0 | 9.1 | 5.6 | -5.5 | -5.1 | 5.8 | 2.2 | -1.2 | 5.1 | 6.1 | 8.5 | 11.8 |
| 1923 | 5.6 | 4.4 | 8.9 | 8.6 | 2.1 | 1.0 | -11.5 | -18.5 | -14.8 | -6.2 | -12.6 | 2.1 |
| 1924 | -5.4 | 1.1 | 2.4 | -15.4 | 11.5 | 8.3 | 7.4 | 10.4 | 8.1 | 7.9 | 11.8 | 5.2 |
| 1925 | 5.6 | 13.8 | 14.9 | 14.4 | -1.1 | -4.7 | -13.4 | -10.8 | -6.4 | -12.9 | -9.3 | -7.0 |
| 1926 | -5.4 | -14.5 | -13.3 | -7.1 | -2.7 | -7.1 | -1.0 | -7.6 | 1.4 | 4.2 | 1.3 | 6.2 |
| 1927 | 5.1 | 1.1 | 18.1 | 6.9 | 6.0 | 8.3 | 6.1 | -5.0 | -0.4 | -4.3 | -8.0 | 7.7 |
| 1928 | -10.1 | 10.5 | 13.8 | 11.9 | -2.7 | -7.9 | -0.4 | 9.8 | 8.1 | 9.1 | 2.6 | 11.8 |
| 1929 | 16.0 | 18.0 | 5.1 | 4.5 | -12.2 | 1.0 | 1.6 | 0.1 | -0.4 | 7.9 | 11.1 | 5.7 |
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 1930 | 12.7 | 7.7 | 1.8 | -3.8 | 2.1 | -5.5 | -4.3 | -1.8 | -7.0 | 3.6 | 1.9 | -1.4 |
| 1931 | 7.0 | -14.9 | 5.6 | 8.6 | 13.1 | 18.8 | 9.4 | 0.1 | 5.1 | -12.9 | -4.7 | 4.7 |
| 1932 | 1.8 | -3.6 | -2.5 | -2.1 | 2.8 | -4.7 | -5.0 | -6.9 | -8.8 | -4.3 | -4.7 | 3.2 |
| 1933 | -11.1 | 4.9 | -2.0 | 3.6 | 6.0 | -3.9 | 3.5 | -0.5 | 2.0 | 3.6 | 7.2 | 8.2 |
| 1934 | 6.5 | 0.1 | 0.2 | 6.1 | -7.4 | 10.7 | 2.9 | -22.4 | -6.4 | 4.2 | 13.1 | -2.4 |
| 1935 | 6.5 | -4.6 | 12.2 | 2.8 | -6.6 | -2.3 | -0.4 | 2.1 | 6.3 | 7.3 | 3.9 | -4.0 |
| 1936 | -2.0 | 0.6 | 1.8 | 22.6 | 4.4 | -1.5 | 4.2 | -8.9 | 2.6 | -0.1 | -13.9 | 0.6 |
| 1937 | 9.4 | -5.0 | 6.2 | 2.0 | -0.3 | 3.4 | -5.6 | 3.3 | 0.8 | -2.5 | -2.0 | 6.7 |
| 1938 | 7.5 | 3.4 | -3.6 | 3.6 | 13.1 | 18.0 | 18.5 | 13.0 | 7.5 | 12.8 | 1.9 | 13.8 |
| 1939 | 17.0 | 7.7 | 11.6 | 9.4 | -1.1 | -1.5 | 8.1 | -0.5 | -9.4 | -14.7 | -8.0 | -8.6 |
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 1940 | -0.1 | -4.1 | -10.6 | -9.6 | -14.5 | -19.3 | -15.4 | -18.5 | -19.6 | -18.4 | -6.7 | -29.4 |
| 1941 | -9.7 | -15.4 | -10.6 | -11.2 | -6.6 | -14.4 | -20.6 | -19.1 | -8.2 | -20.2 | -9.3 | -8.6 |
| 1942 | -13.0 | -3.6 | -5.8 | -5.5 | 5.2 | 8.3 | -1.0 | 4.0 | 8.7 | 8.5 | -4.0 | 13.8 |
| 1943 | 9.4 | 10.5 | 4.0 | 13.5 | 2.8 | -7.9 | 2.9 | 7.8 | 5.7 | 9.1 | 3.9 | -8.6 |
| 1944 | -8.2 | 3.9 | 5.6 | -5.5 | -1.1 | -3.9 | -8.9 | 3.3 | 2.6 | -8.6 | -6.7 | 4.2 |
| 1945 | 5.1 | 6.3 | 13.2 | -7.1 | -0.3 | 8.3 | 3.5 | 11.7 | 8.7 | 2.4 | -3.4 | 6.7 |
| 1946 | -2.5 | 4.4 | -2.0 | -9.6 | -11.4 | -9.6 | -10.2 | -4.4 | -16.0 | -12.3 | -1.4 | -5.5 |
| 1947 | -4.9 | -4.1 | 11.6 | -4.6 | -13.7 | 2.6 | 9.4 | 7.2 | 11.7 | -1.9 | 9.2 | 5.2 |
| 1948 | -3.0 | -2.7 | -4.1 | 2.8 | 3.6 | -4.7 | 0.9 | -4.4 | -7.6 | 6.1 | 4.6 | -5.5 |
| 1949 | -7.3 | 2.0 | 5.6 | 1.2 | -5.8 | -12.0 | -1.7 | -4.4 | 2.0 | 5.4 | -6.0 | 7.7 |
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 1950 | 5.1 | 17.6 | 17.6 | 16.8 | 7.6 | 26.9 | 21.1 | 12.3 | 6.9 | 17.1 | 12.5 | 23.0 |
| 1951 | 16.5 | 9.6 | -1.4 | -1.3 | -6.6 | 5.0 | -8.2 | -0.5 | -7.0 | -8.0 | -3.4 | -3.0 |
| 1952 | -9.2 | -7.9 | 0.2 | -8.8 | 6.0 | 7.4 | 3.5 | -3.7 | -3.4 | 1.8 | -0.7 | -12.6 |
| 1953 | 2.2 | -6.0 | -5.8 | -0.5 | -31.9 | -2.3 | -1.0 | -17.2 | -13.0 | -0.1 | -2.0 | -4.0 |
| 1954 | 6.0 | -3.6 | -0.9 | 6.9 | 4.4 | -1.5 | 4.2 | 10.4 | 4.5 | 1.8 | 3.9 | 12.8 |
| 1955 | -5.4 | 15.2 | 2.9 | -3.0 | 13.1 | 16.4 | 19.2 | 14.9 | 14.1 | 15.2 | 15.1 | 9.3 |
| 1956 | 11.3 | 12.4 | 9.4 | 11.1 | 17.9 | 12.3 | 12.6 | 11.0 | 0.2 | 18.3 | 1.9 | 10.3 |
| 1957 | 5.6 | -2.2 | -0.9 | 1.2 | -12.2 | -2.3 | 0.9 | -9.5 | -10.6 | -1.3 | -11.9 | -3.5 |
| 1958 | -16.8 | -6.9 | -1.4 | 1.2 | -8.2 | 0.2 | 2.2 | 7.8 | -3.4 | -1.9 | -4.7 | -6.5 |
| 1959 | -8.7 | -14.0 | 8.4 | 3.6 | 2.8 | -6.3 | -5.0 | -5.0 | 0.2 | 4.2 | 11.1 | 8.2 |
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 1960 | 0.3 | -2.2 | 5.6 | 7.8 | 5.2 | -2.3 | 4.8 | 6.6 | 6.9 | -0.7 | 7.2 | 6.7 |
| 1961 | -2.5 | 6.3 | -20.9 | 9.4 | 1.3 | -3.1 | 2.2 | 0.1 | 0.8 | -5.0 | 7.2 | 13.8 |
| 1962 | 17.0 | 5.3 | -1.4 | 1.2 | 12.3 | 5.0 | -0.4 | 4.6 | 5.1 | 10.3 | 5.2 | 0.6 |
| 1963 | 9.4 | 3.0 | 7.3 | 6.1 | 2.8 | -9.6 | -1.0 | -2.4 | -5.2 | -12.9 | -9.3 | -11.6 |
| 1964 | -4.0 | -0.3 | 8.4 | 13.5 | 2.8 | 7.4 | 6.8 | 14.3 | 14.1 | 12.8 | 2.6 | -3.0 |
| 1965 | -4.0 | 1.6 | 2.9 | -12.9 | -0.3 | -12.8 | -22.6 | -11.4 | -14.2 | -11.1 | -17.9 | 1.6 |
| 1966 | -12.0 | -4.1 | -13.9 | -7.1 | -9.0 | 1.0 | -1.0 | 4.0 | -2.2 | -2.5 | -0.1 | -4.0 |
| 1967 | 14.6 | 12.9 | 7.8 | -3.0 | -3.5 | 6.6 | 1.6 | 5.9 | 5.1 | -0.1 | -4.0 | -5.5 |
| 1968 | 4.1 | 9.6 | -3.0 | -3.0 | 14.7 | 12.3 | 7.4 | 0.1 | -2.8 | -1.9 | -3.4 | 2.1 |
| 1969 | -13.5 | -6.9 | 1.8 | -8.8 | -6.6 | -0.6 | -6.9 | -4.4 | -10.6 | -11.7 | -0.1 | 3.7 |
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 1970 | -10.1 | -10.7 | 1.8 | -4.6 | 2.1 | 9.9 | -5.6 | 4.0 | 12.9 | 10.3 | 19.7 | 17.4 |
| 1971 | 2.7 | 15.7 | 19.2 | 22.6 | 9.2 | 2.6 | 1.6 | 14.9 | 15.9 | 17.7 | 7.2 | 2.1 |
| 1972 | 3.7 | 8.2 | 2.4 | -5.5 | -16.1 | -12.0 | -18.6 | -8.9 | -14.8 | -11.1 | -3.4 | -12.1 |
| 1973 | -3.0 | -13.5 | 0.8 | -2.1 | 2.8 | 12.3 | 6.1 | 12.3 | 13.5 | 9.7 | 31.6 | 16.9 |
| 1974 | 20.8 | 16.2 | 20.3 | 11.1 | 10.7 | 2.6 | 12.0 | 6.6 | 12.3 | 8.5 | -1.4 | -0.9 |
| 1975 | -4.9 | 5.3 | 11.6 | 14.4 | 6.0 | 15.5 | 21.1 | 20.7 | 22.5 | 17.7 | 13.8 | 19.5 |
| 1976 | 11.8 | 12.9 | 13.2 | 1.2 | 2.1 | 0.2 | -12.8 | -12.1 | -13.0 | 3.0 | 9.8 | -3.0 |
| 1977 | -4.0 | 7.7 | -9.5 | -9.6 | -11.4 | -17.7 | -14.7 | -12.1 | -9.4 | -12.9 | -14.6 | -10.6 |
| 1978 | -3.0 | -24.4 | -5.8 | -7.9 | 16.3 | 5.8 | 6.1 | 1.4 | 0.8 | -6.2 | -2.0 | -0.9 |
| 1979 | -4.0 | 6.7 | -3.0 | -5.5 | 3.6 | 5.8 | -8.2 | -5.0 | 1.4 | -2.5 | -4.7 | -7.5 |
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 1980 | 3.2 | 1.1 | -8.5 | -12.9 | -3.5 | -4.7 | -1.7 | 1.4 | -5.2 | -1.9 | -3.4 | -0.9 |
| 1981 | 2.7 | -3.2 | -16.6 | -5.5 | 7.6 | 11.5 | 9.4 | 5.9 | 7.5 | -5.0 | 2.6 | 4.7 |
| 1982 | 9.4 | 0.6 | 2.4 | -3.8 | -8.2 | -20.1 | -19.3 | -23.6 | -21.4 | -20.2 | -31.1 | -21.3 |
| 1983 | -30.6 | -33.3 | -28.0 | -17.0 | 6.0 | -3.1 | -7.6 | 0.1 | 9.9 | 4.2 | -0.7 | 0.1 |
| 1984 | 1.3 | 5.8 | -5.8 | 2.0 | -0.3 | -8.7 | 2.2 | 2.7 | 2.0 | -5.0 | 3.9 | -1.4 |
| 1985 | -3.5 | 6.7 | -2.0 | 14.4 | 2.8 | -9.6 | -2.3 | 8.5 | 0.2 | -5.6 | -1.4 | 2.1 |
| 1986 | 8.0 | -10.7 | 0.8 | 1.2 | -6.6 | 10.7 | 2.2 | -7.6 | -5.2 | 6.1 | -13.9 | -13.6 |
| 1987 | -6.3 | -12.6 | -16.6 | -24.4 | -21.6 | -20.1 | -18.6 | -14.0 | -11.2 | -5.6 | -1.4 | -4.5 |
| 1988 | -1.1 | -5.0 | 2.4 | -1.3 | 10.0 | -3.9 | 11.3 | 14.9 | 20.1 | 14.6 | 21.0 | 10.8 |
| 1989 | 13.2 | 9.1 | 6.7 | 21.0 | 14.7 | 7.4 | 9.4 | -6.3 | 5.7 | 7.3 | -2.0 | -5.0 |
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 1990 | -1.1 | -17.3 | -8.5 | -0.5 | 13.1 | 1.0 | 5.5 | -5.0 | -7.6 | 1.8 | -5.3 | -2.4 |
| 1991 | 5.1 | 0.6 | -10.6 | -12.9 | -19.3 | -5.5 | -1.7 | -7.6 | -16.6 | -12.9 | -7.3 | -16.7 |
| 1992 | -25.4 | -9.3 | -24.2 | -18.7 | 0.5 | -12.8 | -6.9 | 1.4 | 0.8 | -17.2 | -7.3 | -5.5 |
| 1993 | -8.2 | -7.9 | -8.5 | -21.1 | -8.2 | -16.0 | -10.8 | -14.0 | -7.6 | -13.5 | 0.6 | 1.6 |
| 1994 | -1.6 | 0.6 | -10.6 | -22.8 | -13.0 | -10.4 | -18.0 | -17.2 | -17.2 | -14.1 | -7.3 | -11.6 |
| 1995 | -4.0 | -2.7 | 3.5 | -16.2 | -9.0 | -1.5 | 4.2 | 0.8 | 3.2 | -1.3 | 1.3 | -5.5 |
| 1996 | 8.4 | 1.1 | 6.2 | 7.8 | 1.3 | 13.9 | 6.8 | 4.6 | 6.9 | 4.2 | -0.1 | 7.2 |
| 1997 | 4.1 | 13.3 | -8.5 | -16.2 | -22.4 | -24.1 | -9.5 | -19.8 | -14.8 | -17.8 | -15.2 | -9.1 |
| 1998 | -23.5 | -19.2 | -28.5 | -24.4 | 0.5 | 9.9 | 14.6 | 9.8 | 11.1 | 10.9 | 12.5 | 13.3 |
| 1999 | 15.6 | 8.6 | 8.9 | 18.5 | 1.3 | 1.0 | 4.8 | 2.1 | -0.4 | 9.1 | 13.1 | 12.8 |
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 2000 | 5.1 | 12.9 | 9.4 | 16.8 | 3.6 | -5.5 | -3.7 | 5.3 | 9.9 | 9.7 | 22.4 | 7.7 |
| 2001 | 8.9 | 11.9 | 6.7 | 0.3 | -9.0 | 1.8 | -3.0 | -8.9 | 1.4 | -1.9 | 7.2 | -9.1 |
| 2002 | 2.7 | 7.7 | -5.2 | -3.8 | -14.5 | -6.3 | -7.6 | -14.6 | -7.6 | -7.4 | -6.0 | -10.6 |
| 2003 | -2.0 | -7.4 | -6.8 | -5.5 | -7.4 | -12.0 | 2.9 | -1.8 | -2.2 | -1.9 | -3.4 | 9.8 |
| 2004 | -11.6 | 8.6 | 0.2 | -15.4 | 13.1 | -14.4 | -6.9 | -7.6 | -2.8 | -3.7 | -9.3 | -8.0 |
| 2005 | 1.8 | -29.1 | 0.2 | -11.2 | -14.5 | 2.6 | 0.9 | -6.9 | 3.9 | 10.9 | -2.7 | 0.6 |
| 2006 | 12.7 | 0.1 | 13.8 | 15.2 | -9.8 | -5.5 | -8.9 | -15.9 | -5.1 | -15.3 | -1.4 | -3.0 |
| 2007 | -7.3 | -2.7 | -1.4 | -3.0 | -2.7 | 5.0 | -4.3 | 2.7 | 1.5 | 5.4 | 9.8 | 14.4 |
| 2008 | 14.1 | 21.3 | 12.2 | 4.5 | -4.3 | 5.0 | 2.2 | 9.1 | 14.1 | 13.4 | 17.1 | 13.3 |
| 2009 | 9.4 | 14.8 | 0.2 | 8.6 | -5.1 | -2.3 | 1.6 | -5.0 | 3.9 | -14.7 | -6.7 | -7.0 |
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 2010 | -10.1 | -14.5 | -10.6 | 15.2 | 10.0 | 1.8 | 20.5 | 18.8 | 25.0 | 18.3 | 16.4 | 27.1 |
| 2011 | 19.9 | 22.3 | 21.4 | 25.1 | 2.1 | 0.2 | 10.7 | 2.1 | 11.7 | 7.3 | 13.8 | 23.0 |
| 2012 | 9.4 | 2.5 | 2.9 |
posted by Larry E.Goines Jr. | 10:32 AM
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