Year Kilotonnes
1850 0
1851 0.00017
1852 0.00034
1853 0.00051
1854 0.00069
1855 0.00086
1856 0.00103
1857 0.0012
1858 0.00137
1859 0.00154
1860 0.00172
1861 0.00188
1862 0.00204
1863 0.0022
1864 0.00236
1865 0.00252
1866 0.00268
1867 0.00283
1868 0.00298
1869 0.00314
1870 0.00329
1871 0.00374
1872 0.00419
1873 0.00464
1874 0.00509
1875 0.00615
1876 0.00672
1877 0.0072
1878 0.00798
1879 0.00873
1880 0.00915
1881 0.00951
1882 0.01003
1883 0.01082
1884 0.01202
1885 0.01325
1886 0.01326
1887 0.01448
1888 0.01588
1889 0.01782
1890 0.0191
1891 0.0209
1892 0.02218
1893 0.0216
1894 0.02465
1895 0.02681
1896 0.02837
1897 0.2696
1898 0.6103
1899 0.426
1900 0.5966
1901 0.9378
1902 1.379
1903 1.152
1904 1.181
1905 1.352
1906 1.466
1907 1.922
1908 2.194
1909 2.622
1910 3.307
1911 3.637
1912 3.98
1913 4.595
1914 4.94
1915 5.456
1916 7.458
1917 9.69
1918 11.55
1919 15.68
1920 16.43
1921 14.86
1922 19.29
1923 20.7
1924 21.58
1925 24.44
1926 25.74
1927 25.82
1928 22.73
1929 21.96
1930 27.33
1931 24.67
1932 23.07
1933 26.13
1934 25.89
1935 26.92
1936 28.97
1937 31.92
1938 35.4
1939 41.4
1940 44.54
1941 44.66
1942 37.41
1943 35.64
1944 30.9
1945 14.65
1946 18.27
1947 21.94
1948 26.82
1949 26.23
1950 23.97
1951 29.85
1952 38.96
1953 38.22
1954 37.39
1955 42.01
1956 44.15
1957 50.97
1958 54.74
1959 61.39
1960 65.54
1961 69.43
1962 76.47
1963 80.25
1964 83.38
1965 87.36
1966 88.17
1967 90.93
1968 95.97
1969 96.28
1970 97.04
1971 91.97
1972 94.38
1973 97.64
1974 95.08
1975 89.24
1976 114.5
1977 127.9
1978 147.7
1979 152.7
1980 201.1
1981 194.5
1982 184.2
1983 179.3
1984 187.6
1985 201.9
1986 212.4
1987 216.5
1988 238.3
1989 252.2
1990 252.3
1991 245.2
1992 253
1993 243.8
1994 257.6
1995 227.1
1996 191
1997 174.1
1998 178.3
1999 176.6
2000 187.9