Year Kilotonnes
1850 0.00003
1851 0.00004
1852 0.00005
1853 0.00005
1854 0.00006
1855 0.00007
1856 0.00008
1857 0.00009
1858 0.00015
1859 0.00018
1860 0.00035
1861 0.00071
1862 0.00094
1863 0.00115
1864 0.00136
1865 0.00159
1866 0.00174
1867 0.0231
1868 0.0443
1869 0.06545
1870 0.08766
1871 0.109
1872 0.1301
1873 0.1515
1874 0.1726
1875 0.194
1876 0.2152
1877 0.2366
1878 0.2575
1879 0.2787
1880 0.3002
1881 0.3479
1882 0.627
1883 0.932
1884 1.034
1885 1.064
1886 1.19
1887 1.323
1888 1.532
1889 1.586
1890 1.862
1891 2.303
1892 2.213
1893 2.407
1894 2.35
1895 2.394
1896 2.698
1897 3.177
1898 3.754
1899 3.733
1900 3.192
1901 4.133
1902 4.213
1903 4.623
1904 5.233
1905 5.852
1906 6.41
1907 8.668
1908 8.664
1909 9.122
1910 10.11
1911 11.39
1912 13
1913 14.47
1914 14
1915 14.36
1916 12.45
1917 16.19
1918 18.88
1919 20.8
1920 18.62
1921 20.94
1922 24.33
1923 37.47
1924 33.32
1925 35.65
1926 38.2
1927 40.75
1928 39.69
1929 41.1
1930 35.38
1931 30.72
1932 28.43
1933 27.36
1934 32.47
1935 34.32
1936 38.05
1937 44.18
1938 57.99
1939 56.87
1940 65.44
1941 61.01
1942 64.44
1943 68.51
1944 56.76
1945 53.73
1946 52.74
1947 62.27
1948 71.45
1949 82.25
1950 60.65
1951 69.37
1952 81.9
1953 91.69
1954 98.5
1955 105.6
1956 113.3
1957 120.3
1958 121.7
1959 122.4
1960 122.6
1961 127.4
1962 138.4
1963 143.8
1964 151.3
1965 162.5
1966 177.6
1967 197.2
1968 222.1
1969 250.1
1970 298.7
1971 300.5
1972 338.4
1973 369.2
1974 408
1975 414.7
1976 397.5
1977 411.7
1978 455.1
1979 491.8
1980 527.5
1981 547.5
1982 552
1983 614.5
1984 611.5
1985 627.5
1986 646.5
1987 652.5
1988 734.5
1989 758.5
1990 655.5
1991 520.5
1992 475.5
1993 464
1994 456
1995 456
1996 456
1997 456
1998 456
1999 456
2000 456