Year Kilotonnes
1850 0
1851 0.00673
1852 0.01347
1853 0.0202
1854 0.02693
1855 0.03367
1856 0.04044
1857 0.04719
1858 0.05395
1859 0.06072
1860 0.06749
1861 0.07427
1862 0.08105
1863 0.08784
1864 0.09463
1865 0.1014
1866 0.1082
1867 0.115
1868 0.1218
1869 0.1287
1870 0.1355
1871 0.1423
1872 0.1491
1873 0.156
1874 0.1628
1875 0.1697
1876 0.1765
1877 0.1834
1878 0.1902
1879 0.1971
1880 0.204
1881 0.2108
1882 0.2177
1883 0.2246
1884 0.2315
1885 0.2384
1886 0.2453
1887 0.2522
1888 0.2591
1889 0.266
1890 0.273
1891 0.2799
1892 0.2868
1893 0.2938
1894 0.3007
1895 0.3076
1896 0.3146
1897 0.3215
1898 0.3285
1899 0.3355
1900 0.3424
1901 0.3494
1902 0.3564
1903 0.3634
1904 0.3704
1905 0.3774
1906 0.3844
1907 0.3914
1908 0.3984
1909 0.4054
1910 0.4124
1911 0.4195
1912 0.4265
1913 0.4335
1914 0.4406
1915 0.4407
1916 0.5039
1917 0.6301
1918 0.5673
1919 0.2522
1920 0.5677
1921 0.631
1922 0.8887
1923 1.331
1924 1.084
1925 1.021
1926 20.08
1927 17.95
1928 14.47
1929 15.85
1930 12.02
1931 9.261
1932 3.449
1933 2.228
1934 3.002
1935 3.615
1936 7.366
1937 12.61
1938 16.4
1939 12.11
1940 11.64
1941 12.81
1942 16.04
1943 15.32
1944 16.04
1945 18.41
1946 19.42
1947 20.22
1948 21.34
1949 23.29
1950 51.55
1951 55.92
1952 64.5
1953 49.83
1954 52.02
1955 59.25
1956 61.85
1957 73.8
1958 69.35
1959 62.09
1960 59.19
1961 48.64
1962 38.84
1963 30.36
1964 36.69
1965 36.53
1966 22.71
1967 18.92
1968 22.01
1969 25.81
1970 21.82
1971 25.89
1972 22.45
1973 22.91
1974 21.48
1975 18.03
1976 16.7
1977 19.64
1978 31.29
1979 29.77
1980 76.78
1981 87.82
1982 99.38
1983 120.4
1984 154.5
1985 131.9
1986 105.1
1987 109.5
1988 108.7
1989 108
1990 111.9
1991 122.2
1992 129.6
1993 134.8
1994 135.3
1995 145.1
1996 142.5
1997 160.2
1998 170.8
1999 193.3
2000 210.4