Year Kilotonnes
1850 0.5602
1851 0.7147
1852 0.8688
1853 1.02
1854 1.17
1855 1.323
1856 1.492
1857 1.659
1858 1.802
1859 1.961
1860 2.107
1861 2.317
1862 3.575
1863 3.265
1864 4.216
1865 3.789
1866 4.423
1867 5.53
1868 15.98
1869 22.86
1870 27.28
1871 18.28
1872 25.01
1873 24.05
1874 21.43
1875 20.87
1876 24.01
1877 28.04
1878 22.36
1879 25.69
1880 29.4
1881 28.83
1882 33.7
1883 36.84
1884 39.55
1885 42.66
1886 42.32
1887 44.58
1888 45.93
1889 49.01
1890 54.13
1891 52.62
1892 54.11
1893 53.38
1894 61.77
1895 57
1896 54.65
1897 57.04
1898 59.73
1899 66.94
1900 67.4
1901 65.03
1902 68.77
1903 71.84
1904 73.51
1905 78.51
1906 90.22
1907 96.59
1908 96.08
1909 100.7
1910 101.1
1911 101.5
1912 104.5
1913 110.9
1914 99.24
1915 83.17
1916 84.13
1917 60.15
1918 69.51
1919 67.68
1920 68.83
1921 76.66
1922 89.56
1923 98.54
1924 118
1925 112.9
1926 124.2
1927 145.4
1928 133.1
1929 156.5
1930 142.7
1931 116.9
1932 95.22
1933 102.4
1934 133.6
1935 151.6
1936 103.9
1937 145
1938 143.9
1939 155.2
1940 164.6
1941 100.2
1942 68.1
1943 40.79
1944 22.03
1945 13.26
1946 18.96
1947 51.16
1948 69.51
1949 110.8
1950 185.7
1951 252.9
1952 243.6
1953 264.8
1954 283.6
1955 297.6
1956 328.3
1957 353.6
1958 349.4
1959 370.3
1960 429.1
1961 484.2
1962 560.5
1963 654.3
1964 719.1
1965 844.3
1966 961.3
1967 1090
1968 1173
1969 1241
1970 1415
1971 1444
1972 1478
1973 1535
1974 1604
1975 1644
1976 1661
1977 1650
1978 1638
1979 1621
1980 1878
1981 1665
1982 1425
1983 1232
1984 1057
1985 950.5
1986 964.5
1987 1014
1988 981.5
1989 927
1990 886.5
1991 828
1992 778.5
1993 727
1994 679.5
1995 643.5
1996 614
1997 575.5
1998 508
1999 461
2000 385.5