Year Kilotonnes
1850 0.3907
1851 0.2606
1852 0.4903
1853 0.4413
1854 0.5472
1855 0.5292
1856 0.7279
1857 0.8338
1858 0.8777
1859 0.8288
1860 1.182
1861 1.164
1862 1.301
1863 1.158
1864 1.481
1865 1.462
1866 1.227
1867 1.549
1868 1.5
1869 1.822
1870 1.618
1871 1.475
1872 1.797
1873 1.595
1874 1.795
1875 1.81
1876 1.947
1877 1.712
1878 1.849
1879 1.801
1880 1.629
1881 1.647
1882 1.813
1883 1.35
1884 1.791
1885 1.655
1886 1.544
1887 1.311
1888 1.6
1889 1.281
1890 1.401
1891 1.305
1892 1.488
1893 1.654
1894 1.723
1895 1.742
1896 1.766
1897 1.778
1898 2.147
1899 2.346
1900 2.557
1901 3.346
1902 3.444
1903 3.926
1904 4.123
1905 4.603
1906 4.58
1907 4.968
1908 5.471
1909 5.951
1910 6.083
1911 7.21
1912 7.176
1913 6.449
1914 6.388
1915 7.888
1916 9.547
1917 11.51
1918 12.81
1919 10.76
1920 11.59
1921 9.601
1922 11.37
1923 14.58
1924 14.51
1925 15.76
1926 17.1
1927 18.78
1928 22.49
1929 24.12
1930 21.03
1931 18.87
1932 12.96
1933 15.63
1934 20.19
1935 21.14
1936 21.57
1937 29.31
1938 28.82
1939 28.43
1940 29.66
1941 33.8
1942 31.44
1943 34.7
1944 36.29
1945 38.19
1946 43.2
1947 40.35
1948 41.9
1949 43.33
1950 55.28
1951 60.97
1952 60.01
1953 73.33
1954 75.94
1955 71.11
1956 61.05
1957 58.87
1958 57.11
1959 51.82
1960 55.62
1961 51.57
1962 48.38
1963 49.25
1964 48.12
1965 51.56
1966 50.14
1967 46.48
1968 40.18
1969 42.74
1970 45.87
1971 43.91
1972 37.94
1973 42.01
1974 46.78
1975 48.25
1976 42.09
1977 46.9
1978 49.81
1979 39.64
1980 49.72
1981 43.76
1982 38.74
1983 24.34
1984 24.86
1985 20.35
1986 25.58
1987 22.64
1988 22.37
1989 21.01
1990 21
1991 34.98
1992 53.58
1993 33.99
1994 16.5
1995 79.61
1996 60.96
1997 33.72
1998 27
1999 14.65
2000 12.01