Year Kilotonnes
1850 0.07195
1851 0.048
1852 0.096
1853 0.144
1854 0.192
1855 0.24
1856 0.288
1857 0.336
1858 0.384
1859 0.432
1860 0.48
1861 0.528
1862 0.576
1863 0.624
1864 0.672
1865 0.72
1866 0.768
1867 0.816
1868 0.864
1869 0.912
1870 0.96
1871 1.008
1872 1.056
1873 1.104
1874 1.152
1875 1.2
1876 1.2
1877 1.2
1878 1.2
1879 1.2
1880 1.2
1881 1.231
1882 1.261
1883 1.292
1884 1.331
1885 1.362
1886 1.393
1887 1.433
1888 1.463
1889 1.494
1890 1.543
1891 1.673
1892 1.767
1893 1.734
1894 1.747
1895 1.778
1896 1.809
1897 1.84
1898 4.334
1899 6.828
1900 10.56
1901 12.92
1902 11.7
1903 12.9
1904 13
1905 15.71
1906 17.03
1907 28.12
1908 28.6
1909 28.69
1910 37.04
1911 38.44
1912 36.32
1913 37.75
1914 36.81
1915 46.56
1916 55.9
1917 59.28
1918 58.17
1919 51.64
1920 45.93
1921 45.19
1922 47.86
1923 56.4
1924 48.61
1925 48.33
1926 54.27
1927 60.28
1928 68.32
1929 70.09
1930 62.24
1931 55.32
1932 27.07
1933 29.81
1934 34.61
1935 40.1
1936 44.4
1937 50.74
1938 55.36
1939 52.49
1940 60.1
1941 52.11
1942 49.5
1943 49.29
1944 51.53
1945 52.91
1946 43.61
1947 43.7
1948 38.86
1949 51.54
1950 60.63
1951 66.15
1952 68.77
1953 74.25
1954 79.78
1955 83.93
1956 90.48
1957 95.97
1958 94.54
1959 88.57
1960 222.5
1961 233.9
1962 193.9
1963 169.7
1964 194.1
1965 210.3
1966 210.3
1967 209.6
1968 222.9
1969 221.4
1970 228.7
1971 227.6
1972 241.9
1973 235.7
1974 236.8
1975 203.7
1976 230
1977 313.1
1978 317.7
1979 338.9
1980 319.7
1981 305.6
1982 309.8
1983 293.8
1984 325.3
1985 338.8
1986 320.9
1987 336.7
1988 273.9
1989 312.8
1990 279.6
1991 316.3
1992 332.9
1993 358.6
1994 367.6
1995 361.5
1996 360.8
1997 415.2
1998 455.9
1999 445.9
2000 473.2