Year Kilotonnes
1850 0.1314
1851 0.1473
1852 0.2944
1853 0.4398
1854 0.5836
1855 0.73
1856 0.8874
1857 1.043
1858 1.182
1859 1.333
1860 1.479
1861 1.745
1862 1.764
1863 1.866
1864 2.033
1865 2.064
1866 2.304
1867 2.619
1868 2.166
1869 2.986
1870 3.289
1871 4.441
1872 4.611
1873 4.343
1874 5.119
1875 6.093
1876 7.438
1877 7.421
1878 9.858
1879 10.13
1880 11.82
1881 12.41
1882 13.19
1883 14.93
1884 14.62
1885 15.67
1886 16.32
1887 16.09
1888 18.47
1889 21.69
1890 21.08
1891 22.39
1892 24.02
1893 27.23
1894 29.92
1895 32.79
1896 33.86
1897 39
1898 43.77
1899 51.49
1900 58.45
1901 59.1
1902 57.82
1903 60.69
1904 66.4
1905 60.68
1906 69.12
1907 79.52
1908 80.88
1909 83.92
1910 81.6
1911 89.07
1912 97.06
1913 112.4
1914 93.75
1915 83.88
1916 92.19
1917 83.1
1918 33.78
1919 25.85
1920 23.58
1921 25.84
1922 32.01
1923 35.66
1924 44.69
1925 45.71
1926 68.96
1927 87.26
1928 97.12
1929 111.1
1930 135.5
1931 161.1
1932 177.3
1933 204.7
1934 250.5
1935 290.3
1936 338
1937 347.5
1938 368.9
1939 404
1940 454.6
1941 448
1942 441.7
1943 435.4
1944 428.7
1945 422.2
1946 463.4
1947 514.4
1948 579.3
1949 644.5
1950 709
1951 763.2
1952 813.1
1953 857.4
1954 931.6
1955 1043
1956 1136
1957 1209
1958 1258
1959 1281
1960 1299
1961 1288
1962 1321
1963 1343
1964 1390
1965 1454
1966 1483
1967 1520
1968 1528
1969 1561
1970 1609
1971 1645
1972 1688
1973 1734
1974 1796
1975 1850
1976 1858
1977 1904
1978 1922
1979 1911
1980 1924
1981 1746
1982 1714
1983 1749
1984 1735
1985 1732
1986 1696
1987 1632
1988 1606
1989 1536
1990 1891
1991 1269
1992 1188
1993 1097
1994 857.5
1995 819.5
1996 646.5
1997 566
1998 511.5
1999 514.5
2000 514.5