Year Kilotonnes
1850 0.5613
1851 0.6296
1852 0.8059
1853 0.8801
1854 1.008
1855 1.161
1856 1.339
1857 1.466
1858 1.682
1859 1.651
1860 1.782
1861 1.879
1862 2.116
1863 2.352
1864 2.579
1865 2.797
1866 2.899
1867 3.176
1868 3.426
1869 3.687
1870 3.958
1871 4.636
1872 4.989
1873 5.271
1874 5.536
1875 5.64
1876 5.971
1877 5.882
1878 6.408
1879 6.808
1880 7.704
1881 8.081
1882 8.494
1883 9.359
1884 9.609
1885 9.975
1886 10.2
1887 10.31
1888 11.37
1889 12.38
1890 12.85
1891 13.55
1892 13.53
1893 14.51
1894 15.17
1895 16.19
1896 17.07
1897 18.26
1898 20.03
1899 21.41
1900 23.44
1901 23.74
1902 23.21
1903 24.27
1904 25.35
1905 25.75
1906 27.77
1907 30.59
1908 31.7
1909 32.67
1910 32.35
1911 34.59
1912 37.82
1913 41.09
1914 35.57
1915 32.74
1916 34.66
1917 32.64
1918 29.27
1919 38.18
1920 43.56
1921 45.25
1922 40.99
1923 38.63
1924 49.34
1925 46.01
1926 46.27
1927 50.24
1928 54.79
1929 61.39
1930 53.86
1931 50.41
1932 44.26
1933 41.15
1934 41.43
1935 41.96
1936 44.59
1937 51.44
1938 47.74
1939 57.92
1940 66.01
1941 66.25
1942 71.05
1943 79.67
1944 76.74
1945 43.07
1946 54.62
1947 63.56
1948 68.62
1949 77.97
1950 81.23
1951 89.12
1952 95.01
1953 97.5
1954 104.8
1955 109.6
1956 121
1957 127.7
1958 140.2
1959 133.5
1960 142.8
1961 161.4
1962 175.7
1963 189
1964 199.5
1965 197.3
1966 212.9
1967 222.4
1968 249.9
1969 284.7
1970 314.2
1971 330.8
1972 337.6
1973 330.1
1974 339.8
1975 359.4
1976 367.1
1977 379.9
1978 383.9
1979 386.5
1980 390
1981 320.5
1982 287.1
1983 321.6
1984 348
1985 306.5
1986 302
1987 307
1988 294.5
1989 286.5
1990 271
1991 222.5
1992 190
1993 162.5
1994 119.5
1995 119.5
1996 113.5
1997 101
1998 89.5
1999 85.5
2000 62