Year Kilotonnes
1850 0.00882
1851 0.00989
1852 0.01267
1853 0.02535
1854 0.03805
1855 0.05076
1856 0.0635
1857 0.07625
1858 0.08901
1859 0.1018
1860 0.1146
1861 0.1274
1862 0.1402
1863 0.1531
1864 0.166
1865 0.1788
1866 0.1917
1867 0.2047
1868 0.2176
1869 0.2305
1870 0.2435
1871 0.2565
1872 0.2695
1873 0.2825
1874 0.2955
1875 0.3086
1876 0.3216
1877 0.3347
1878 0.3478
1879 0.3609
1880 0.3741
1881 0.3872
1882 0.4004
1883 0.4136
1884 0.4268
1885 0.44
1886 0.4532
1887 0.4665
1888 0.4797
1889 0.493
1890 0.5063
1891 0.5196
1892 0.533
1893 0.5463
1894 0.5597
1895 0.5295
1896 0.3923
1897 0.5289
1898 0.5508
1899 0.5728
1900 0.7078
1901 0.8797
1902 0.9959
1903 0.9113
1904 0.9402
1905 1.089
1906 1.088
1907 1.622
1908 1.616
1909 1.762
1910 1.779
1911 1.708
1912 1.909
1913 2.034
1914 3.28
1915 4.526
1916 5.772
1917 7.018
1918 8.264
1919 9.51
1920 10.76
1921 12
1922 16.17
1923 9.719
1924 11.73
1925 13.12
1926 14.5
1927 15.7
1928 19.11
1929 22.22
1930 26.21
1931 28.34
1932 27.29
1933 25.46
1934 28.58
1935 31.93
1936 33.67
1937 32.5
1938 37.77
1939 41.02
1940 42.53
1941 45.34
1942 34.86
1943 30.14
1944 25.76
1945 21.67
1946 15.84
1947 32.74
1948 47.11
1949 57.39
1950 67.61
1951 75.01
1952 66.54
1953 64.85
1954 60.04
1955 67.34
1956 71.84
1957 81.28
1958 85.93
1959 88.32
1960 96.96
1961 103.4
1962 109.8
1963 114.9
1964 128.9
1965 140.4
1966 138.4
1967 142.7
1968 133.9
1969 140.7
1970 145.4
1971 161.2
1972 173.7
1973 171.1
1974 184.5
1975 189.3
1976 200.2
1977 202.3
1978 199.9
1979 205.3
1980 214.5
1981 220.7
1982 221.6
1983 238
1984 237.4
1985 243.1
1986 241.8
1987 240.2
1988 243.7
1989 245.4
1990 240
1991 156.1
1992 107.7
1993 90.7
1994 71.49
1995 55
1996 71.87
1997 93.91
1998 122.7
1999 160.3
2000 209.5