Year Kilotonnes
1850 0
1851 0.00024
1852 0.00048
1853 0.00071
1854 0.00095
1855 0.00119
1856 0.00143
1857 0.00167
1858 0.00191
1859 0.00214
1860 0.00238
1861 0.00261
1862 0.00283
1863 0.00305
1864 0.00328
1865 0.00349
1866 0.00371
1867 0.00393
1868 0.00414
1869 0.00435
1870 0.00456
1871 0.00518
1872 0.00581
1873 0.00643
1874 0.00706
1875 0.00853
1876 0.00932
1877 0.00999
1878 0.01107
1879 0.0121
1880 0.01269
1881 0.01318
1882 0.01391
1883 0.015
1884 0.01667
1885 0.01838
1886 0.01839
1887 0.02008
1888 0.02202
1889 0.02471
1890 0.02649
1891 0.02899
1892 0.03077
1893 0.02996
1894 0.03419
1895 0.03719
1896 0.03935
1897 0.04059
1898 0.0466
1899 0.04962
1900 0.05484
1901 0.06164
1902 0.06712
1903 0.07067
1904 0.07431
1905 0.07914
1906 0.1084
1907 0.1159
1908 0.124
1909 0.1251
1910 0.1297
1911 0.1388
1912 0.1568
1913 0.5824
1914 1.434
1915 4.435
1916 8.062
1917 10.83
1918 13.63
1919 16.89
1920 21.3
1921 25.71
1922 33.2
1923 39.72
1924 43.56
1925 46.81
1926 52.12
1927 54.67
1928 59.04
1929 62.45
1930 63.71
1931 62.32
1932 60.65
1933 63.04
1934 65.26
1935 67.78
1936 70.34
1937 73.32
1938 75.55
1939 77.56
1940 81.09
1941 82.67
1942 83.88
1943 86.95
1944 88.88
1945 90.48
1946 91.3
1947 92.92
1948 95.69
1949 97.29
1950 80.05
1951 91.38
1952 96.77
1953 93.54
1954 84.51
1955 88.5
1956 90.54
1957 68.53
1958 66.69
1959 66.69
1960 57.34
1961 45.64
1962 44.04
1963 49.07
1964 75.21
1965 73.17
1966 77.62
1967 84.32
1968 85.71
1969 77.54
1970 70.15
1971 50.48
1972 41.71
1973 41.43
1974 43.93
1975 49.48
1976 68.25
1977 86.03
1978 87.12
1979 85.54
1980 93.78
1981 94.54
1982 77.38
1983 93.07
1984 92.39
1985 88.25
1986 86
1987 83.45
1988 86.95
1989 100.5
1990 127.9
1991 116.2
1992 110
1993 123
1994 125.5
1995 133.4
1996 147.4
1997 156.2
1998 128.9
1999 113
2000 130.1