Year Kilotonnes
1850 0.00982
1851 0.00982
1852 0.01966
1853 0.02949
1854 0.03934
1855 0.04919
1856 0.05905
1857 0.06892
1858 0.07879
1859 0.08868
1860 0.09857
1861 0.1959
1862 0.2933
1863 0.3907
1864 0.4881
1865 0.5855
1866 0.6829
1867 0.7803
1868 0.8777
1869 0.9751
1870 1.073
1871 1.17
1872 1.271
1873 1.373
1874 1.474
1875 1.576
1876 1.677
1877 1.779
1878 1.88
1879 1.982
1880 2.083
1881 2.359
1882 2.199
1883 2.214
1884 2.228
1885 2.452
1886 2.675
1887 2.899
1888 3.132
1889 3.482
1890 3.681
1891 3.101
1892 4.001
1893 3.495
1894 4.344
1895 3.835
1896 4.313
1897 4.861
1898 5.026
1899 5.07
1900 6.057
1901 6.598
1902 3.478
1903 3.808
1904 4.522
1905 4.912
1906 4.802
1907 5.2
1908 6.819
1909 6.25
1910 7.457
1911 6.48
1912 7.424
1913 8.485
1914 9.171
1915 10.49
1916 11.53
1917 9.905
1918 10.63
1919 11.63
1920 12.21
1921 16.75
1922 17.26
1923 21.15
1924 22.32
1925 22.11
1926 21.72
1927 23.75
1928 24.64
1929 27.71
1930 30.17
1931 24.87
1932 20.74
1933 25.02
1934 30.2
1935 32.37
1936 33.57
1937 42.77
1938 41.1
1939 43.78
1940 40.7
1941 41.97
1942 42.79
1943 42.92
1944 41.7
1945 41.35
1946 40.06
1947 42.33
1948 49.26
1949 50.99
1950 53.29
1951 30.59
1952 32.29
1953 31.46
1954 29.68
1955 11.67
1956 25.31
1957 22.08
1958 23.06
1959 16.21
1960 3.445
1961 6.807
1962 3.436
1963 2.386
1964 2.346
1965 2.322
1966 3.431
1967 1.107
1968 1.115
1969 1.086
1970 1.07
1971 1.035
1972 1.101
1973 1.137
1974 1.268
1975 1.307
1976 1.617
1977 1.723
1978 1.776
1979 1.827
1980 1.746
1981 1.839
1982 1.969
1983 2.02
1984 2.062
1985 2.192
1986 2.348
1987 2.511
1988 2.667
1989 2.786
1990 2.907
1991 3.081
1992 3.289
1993 3.508
1994 3.738
1995 3.934
1996 4.187
1997 4.464
1998 4.755
1999 5.042
2000 5.307