Year Kilotonnes
1850 0.9147
1851 0.7335
1852 0.9182
1853 0.3711
1854 0.1899
1855 0.1916
1856 0.7422
1857 0.7439
1858 0.7457
1859 0.7474
1860 0.9321
1861 0.9338
1862 1.118
1863 1.303
1864 1.67
1865 1.489
1866 2.223
1867 2.957
1868 3.142
1869 3.144
1870 1.683
1871 2.052
1872 2.238
1873 2.241
1874 2.061
1875 2.064
1876 2.064
1877 2.246
1878 1.697
1879 2.418
1880 3.14
1881 3.532
1882 3.956
1883 4.421
1884 5.042
1885 5.353
1886 5.602
1887 5.863
1888 6.443
1889 6.156
1890 6.696
1891 7.029
1892 7.073
1893 7.272
1894 7.564
1895 7.639
1896 8.346
1897 8.847
1898 9.555
1899 10.27
1900 11.53
1901 12.94
1902 14.37
1903 14.98
1904 16.22
1905 16.74
1906 18.26
1907 19.34
1908 19.67
1909 20.21
1910 23.24
1911 21.86
1912 23.05
1913 19.98
1914 24.1
1915 23.4
1916 23.92
1917 21.92
1918 21.58
1919 19.6
1920 19.58
1921 19.21
1922 19.74
1923 20.94
1924 22.14
1925 22.48
1926 23.82
1927 25.19
1928 25.93
1929 27
1930 27.08
1931 22.99
1932 19.63
1933 19.42
1934 21.97
1935 22.78
1936 22.85
1937 24.33
1938 23.74
1939 25.03
1940 26.9
1941 28.22
1942 28.67
1943 29.84
1944 30.04
1945 30.35
1946 29.93
1947 29.49
1948 29.76
1949 30.18
1950 26.95
1951 24.22
1952 27.64
1953 25.46
1954 26.39
1955 26.13
1956 26.81
1957 26.87
1958 27.85
1959 28.82
1960 31
1961 30.25
1962 26.42
1963 28.3
1964 37.08
1965 42.71
1966 43.54
1967 40.64
1968 39.02
1969 39.75
1970 39.2
1971 37.73
1972 38.87
1973 41.65
1974 45.35
1975 42.21
1976 39.72
1977 38.85
1978 33.97
1979 33.25
1980 36.69
1981 32.79
1982 30.12
1983 29.2
1984 28.52
1985 23.47
1986 25.03
1987 30.47
1988 30.27
1989 32.31
1990 30.5
1991 30
1992 32.5
1993 33.5
1994 34
1995 35
1996 36
1997 29.5
1998 29.5
1999 30
2000 31