Year Kilotonnes
1850 0.02525
1851 0.02833
1852 0.0566
1853 0.08456
1854 0.1122
1855 0.1404
1856 0.1706
1857 0.2006
1858 0.2273
1859 0.2563
1860 0.2844
1861 0.3355
1862 0.3392
1863 0.3587
1864 0.3909
1865 0.3969
1866 0.443
1867 0.5035
1868 0.4164
1869 0.574
1870 0.6323
1871 0.8537
1872 0.8865
1873 0.8349
1874 0.9842
1875 1.171
1876 1.43
1877 1.427
1878 1.895
1879 1.948
1880 2.273
1881 2.386
1882 2.535
1883 2.871
1884 2.811
1885 3.013
1886 3.138
1887 3.094
1888 3.551
1889 4.17
1890 4.052
1891 4.305
1892 4.618
1893 5.236
1894 5.753
1895 6.304
1896 6.51
1897 7.498
1898 8.415
1899 9.9
1900 11.24
1901 11.36
1902 11.12
1903 11.67
1904 12.77
1905 11.67
1906 13.29
1907 15.29
1908 15.55
1909 16.13
1910 15.69
1911 17.12
1912 18.66
1913 21.61
1914 18.02
1915 16.13
1916 17.72
1917 15.98
1918 6.495
1919 4.97
1920 4.533
1921 4.967
1922 6.154
1923 6.857
1924 8.591
1925 8.789
1926 13.26
1927 16.78
1928 18.67
1929 21.37
1930 26.06
1931 30.98
1932 34.09
1933 39.36
1934 48.16
1935 55.81
1936 64.98
1937 66.81
1938 70.93
1939 77.67
1940 87.4
1941 86.14
1942 84.92
1943 83.7
1944 82.42
1945 81.18
1946 89.1
1947 98.9
1948 111.4
1949 123.9
1950 136.3
1951 146.7
1952 156.3
1953 164.8
1954 179.1
1955 200.5
1956 218.3
1957 232.4
1958 241.9
1959 246.4
1960 249.8
1961 247.7
1962 253.9
1963 258.2
1964 267.2
1965 279.6
1966 285.2
1967 292.3
1968 293.8
1969 300.2
1970 309.3
1971 316.3
1972 324.5
1973 333.3
1974 345.3
1975 355.7
1976 357.2
1977 366
1978 369.5
1979 367.4
1980 370
1981 365
1982 355
1983 355
1984 345
1985 345
1986 345
1987 380.5
1988 360
1989 334
1990 318.5
1991 326
1992 229
1993 191
1994 162
1995 137.5
1996 123.2
1997 104.2
1998 95
1999 81.85
2000 71.38