Year Kilotonnes
1850 0.1237
1851 0.08251
1852 0.1552
1853 0.1397
1854 0.1732
1855 0.1675
1856 0.2305
1857 0.264
1858 0.2779
1859 0.2624
1860 0.3743
1861 0.3685
1862 0.4118
1863 0.3668
1864 0.4688
1865 0.463
1866 0.3885
1867 0.4905
1868 0.4749
1869 0.5768
1870 0.5121
1871 0.467
1872 0.5689
1873 0.5049
1874 0.5684
1875 0.573
1876 0.6164
1877 0.5422
1878 0.5855
1879 0.5701
1880 0.5157
1881 0.5214
1882 0.5739
1883 0.4273
1884 0.5671
1885 0.524
1886 0.4889
1887 0.4152
1888 0.5067
1889 0.4055
1890 0.4434
1891 0.4133
1892 0.8269
1893 1.241
1894 1.655
1895 2.07
1896 2.484
1897 2.9
1898 3.315
1899 3.731
1900 4.147
1901 4.637
1902 5.128
1903 5.619
1904 6.11
1905 6.602
1906 7.093
1907 7.585
1908 8.078
1909 8.57
1910 9.062
1911 9.555
1912 10.05
1913 10.54
1914 11.04
1915 11.53
1916 12.02
1917 12.52
1918 13.01
1919 13.51
1920 14
1921 12.34
1922 18.23
1923 15.15
1924 14.15
1925 17.54
1926 16.91
1927 16.4
1928 15.76
1929 17.62
1930 18.19
1931 21.5
1932 24.95
1933 29.1
1934 32.4
1935 36.93
1936 29.86
1937 35.27
1938 41.59
1939 47.42
1940 59.64
1941 62.74
1942 77.38
1943 90.77
1944 83.41
1945 90.28
1946 83.63
1947 87.41
1948 88.73
1949 93.12
1950 112.3
1951 113.4
1952 109.8
1953 108.6
1954 111.5
1955 187.4
1956 206.4
1957 201.7
1958 195.4
1959 194.8
1960 216.8
1961 233.7
1962 285
1963 288.2
1964 295.2
1965 296.3
1966 324.5
1967 336.4
1968 366.3
1969 394
1970 415.8
1971 423.1
1972 465.9
1973 559.5
1974 633.6
1975 634.9
1976 674.3
1977 760.5
1978 806.9
1979 914.5
1980 930.7
1981 937.8
1982 903
1983 905.8
1984 1031
1985 1031
1986 1017
1987 1049
1988 1067
1989 1034
1990 946.5
1991 941.5
1992 971.9
1993 1023
1994 1029
1995 1025
1996 1045
1997 1090
1998 1112
1999 1132
2000 1181