Year Kilotonnes
1850 0.05914
1851 0.06414
1852 0.1281
1853 0.1907
1854 0.2522
1855 0.3156
1856 0.3872
1857 0.4576
1858 0.5154
1859 0.7335
1860 1.064
1861 1.502
1862 1.671
1863 1.665
1864 2.021
1865 2.454
1866 2.421
1867 2.387
1868 2.72
1869 2.611
1870 3.116
1871 3.842
1872 4.388
1873 4.191
1874 4.261
1875 4.433
1876 5.221
1877 4.979
1878 4.679
1879 4.992
1880 5.752
1881 5.301
1882 5.842
1883 6.401
1884 6.476
1885 6.711
1886 6.927
1887 7.695
1888 8.022
1889 9.083
1890 10.07
1891 12.66
1892 12.27
1893 9.851
1894 12.33
1895 12.94
1896 13.97
1897 14.63
1898 15.42
1899 16.84
1900 18.69
1901 17.15
1902 17.24
1903 18.84
1904 20.04
1905 21.09
1906 23.4
1907 27.46
1908 27.19
1909 27.09
1910 25.88
1911 28.75
1912 29.29
1913 31.35
1914 28.54
1915 30.68
1916 28.73
1917 20.58
1918 18.7
1919 15.1
1920 23.49
1921 13.66
1922 19.55
1923 25.66
1924 24.51
1925 25.4
1926 23.63
1927 28.17
1928 28.36
1929 33.2
1930 31.16
1931 31.63
1932 32.47
1933 31.64
1934 31.38
1935 30.68
1936 31.07
1937 33.52
1938 32.17
1939 41.9
1940 28.28
1941 21.74
1942 18.51
1943 18.66
1944 12.93
1945 2.397
1946 22.02
1947 49.05
1948 60.9
1949 59.99
1950 43.62
1951 69
1952 56.82
1953 42.81
1954 56.14
1955 62.79
1956 89.11
1957 104.3
1958 71.25
1959 72.31
1960 88.68
1961 85.29
1962 99.46
1963 154.7
1964 144.4
1965 153.9
1966 151
1967 163.7
1968 146.3
1969 121.5
1970 104
1971 93.5
1972 80
1973 99.96
1974 110.3
1975 77.65
1976 60.33
1977 62.88
1978 51.38
1979 56.08
1980 58
1981 54
1982 50
1983 46
1984 42
1985 38
1986 34
1987 31
1988 28
1989 24.5
1990 22.5
1991 20.5
1992 18
1993 14.5
1994 15
1995 14.5
1996 14
1997 13
1998 12
1999 10
2000 9