Year Kilotonnes
1850 0
1851 0.00053
1852 0.00107
1853 0.0016
1854 0.00213
1855 0.00267
1856 0.0032
1857 0.00374
1858 0.00427
1859 0.00481
1860 0.00534
1861 0.00588
1862 0.00642
1863 0.00696
1864 0.00749
1865 0.00803
1866 0.00857
1867 0.00911
1868 0.00965
1869 0.01019
1870 0.01073
1871 0.01127
1872 0.01181
1873 0.01235
1874 0.01289
1875 0.01344
1876 0.01398
1877 0.01452
1878 0.01506
1879 0.01561
1880 0.01615
1881 0.0249
1882 0.03365
1883 0.0424
1884 0.05117
1885 0.05994
1886 0.06872
1887 0.07751
1888 0.08631
1889 0.09512
1890 0.1039
1891 0.1088
1892 0.1124
1893 0.1147
1894 0.1154
1895 0.1143
1896 0.1631
1897 0.2115
1898 0.2595
1899 0.3118
1900 0.3623
1901 0.4346
1902 0.6774
1903 0.9547
1904 1.631
1905 1.486
1906 1.723
1907 2.05
1908 2.287
1909 2.434
1910 2.516
1911 2.692
1912 3.384
1913 3.854
1914 3.023
1915 2.258
1916 3.769
1917 3.527
1918 3.185
1919 2.423
1920 2.909
1921 2.862
1922 3.429
1923 3.908
1924 4.122
1925 4.103
1926 5.271
1927 5.137
1928 5.129
1929 5.001
1930 4.68
1931 4.67
1932 7.489
1933 10.18
1934 7.731
1935 9.404
1936 12.9
1937 14.73
1938 18.55
1939 18.38
1940 14.37
1941 14.27
1942 11.97
1943 9.447
1944 12.45
1945 13.29
1946 15.28
1947 18.04
1948 19.46
1949 21.55
1950 34.56
1951 39.82
1952 38.92
1953 38.25
1954 37.17
1955 57.94
1956 60.74
1957 57.53
1958 41.88
1959 37.98
1960 34.97
1961 32.29
1962 34.3
1963 40.57
1964 48.9
1965 50.96
1966 53.93
1967 58.06
1968 58.42
1969 55.51
1970 59.33
1971 59.02
1972 59.17
1973 67.14
1974 73.02
1975 61.13
1976 62.08
1977 52.17
1978 52.16
1979 53.91
1980 65.4
1981 47.21
1982 13.12
1983 11.76
1984 18
1985 13.93
1986 25
1987 29.27
1988 28.83
1989 28.22
1990 28.11
1991 37.22
1992 37.43
1993 39.38
1994 41.5
1995 43.75
1996 46.03
1997 47.97
1998 49.18
1999 52.32
2000 55.23