Year Kilotonnes
1850 0.09247
1851 0.1003
1852 0.2003
1853 0.2986
1854 0.3953
1855 0.4947
1856 0.6047
1857 0.7133
1858 0.8053
1859 0.9086
1860 1.003
1861 1.109
1862 1.216
1863 1.313
1864 1.407
1865 1.503
1866 1.601
1867 1.714
1868 1.811
1869 1.903
1870 2.029
1871 2.135
1872 2.208
1873 2.298
1874 2.428
1875 2.513
1876 2.636
1877 2.748
1878 2.819
1879 2.916
1880 3.008
1881 3.12
1882 3.25
1883 3.351
1884 3.468
1885 3.578
1886 3.666
1887 3.779
1888 3.889
1889 4.005
1890 4.105
1891 4.215
1892 4.337
1893 4.415
1894 4.587
1895 4.678
1896 4.761
1897 4.869
1898 4.939
1899 5.131
1900 5.277
1901 5.395
1902 5.46
1903 5.581
1904 5.722
1905 5.829
1906 5.985
1907 6.18
1908 6.272
1909 6.35
1910 6.444
1911 6.596
1912 6.686
1913 6.841
1914 6.965
1915 7.19
1916 7.435
1917 7.739
1918 7.87
1919 8.04
1920 8.55
1921 10.55
1922 14.19
1923 19.53
1924 25.75
1925 30.4
1926 23.79
1927 33.38
1928 32.74
1929 34.34
1930 35.62
1931 34.01
1932 33.67
1933 33.87
1934 35.2
1935 34.2
1936 35.88
1937 35.88
1938 34
1939 41.42
1940 38.95
1941 24.02
1942 19.35
1943 19.85
1944 16.45
1945 19.95
1946 26.34
1947 31.96
1948 32.18
1949 29.83
1950 35.62
1951 41.62
1952 38.34
1953 37.24
1954 38.37
1955 44.17
1956 36.06
1957 32.72
1958 31.91
1959 41.04
1960 45.12
1961 51.1
1962 48.65
1963 57.43
1964 60.76
1965 68.88
1966 70.96
1967 88.97
1968 88.07
1969 91.49
1970 94.05
1971 94.52
1972 90.6
1973 92.5
1974 104
1975 95
1976 68.32
1977 92.8
1978 91.78
1979 117
1980 111
1981 96
1982 79
1983 71
1984 71
1985 70
1986 81
1987 87
1988 76
1989 81
1990 91.5
1991 90
1992 85
1993 80.5
1994 87.5
1995 80.5
1996 73.5
1997 83
1998 88
1999 78.5
2000 65.5