Year Kilotonnes
1850 0.00791
1851 0.00527
1852 0.00992
1853 0.00893
1854 0.01107
1855 0.01071
1856 0.01473
1857 0.01687
1858 0.01776
1859 0.01677
1860 0.02392
1861 0.02355
1862 0.02632
1863 0.02344
1864 0.02996
1865 0.02959
1866 0.02483
1867 0.03135
1868 0.03035
1869 0.03686
1870 0.03273
1871 0.02985
1872 0.03636
1873 0.03227
1874 0.03632
1875 0.03662
1876 0.03939
1877 0.03465
1878 0.03742
1879 0.03643
1880 0.03295
1881 0.03332
1882 0.03668
1883 0.02731
1884 0.03624
1885 0.03349
1886 0.03124
1887 0.02653
1888 0.03238
1889 0.02592
1890 0.02834
1891 0.02641
1892 0.0301
1893 0.03347
1894 0.03486
1895 0.03525
1896 0.03573
1897 0.03597
1898 0.04344
1899 0.04747
1900 0.05175
1901 0.0677
1902 0.06969
1903 0.07943
1904 0.08343
1905 0.09313
1906 0.09266
1907 0.1005
1908 0.1107
1909 0.1204
1910 0.1231
1911 0.3891
1912 0.7755
1913 1.051
1914 1.728
1915 1.095
1916 1.265
1917 2.705
1918 3.767
1919 3.166
1920 3.744
1921 4.398
1922 4.315
1923 5.265
1924 6.942
1925 7.488
1926 8.954
1927 9.596
1928 13.54
1929 14.4
1930 15.53
1931 15.21
1932 15.87
1933 16.22
1934 19.8
1935 20.79
1936 23.44
1937 27.22
1938 31.08
1939 34.75
1940 39.2
1941 35.91
1942 38.35
1943 37.9
1944 39.11
1945 39.92
1946 39.2
1947 44.82
1948 48.36
1949 54.41
1950 54.7
1951 67.34
1952 67.86
1953 68.18
1954 64.27
1955 66.13
1956 69.78
1957 67.72
1958 82.01
1959 92.05
1960 100.5
1961 127
1962 121.9
1963 126.2
1964 134.6
1965 134
1966 132.8
1967 129.5
1968 137.8
1969 130.9
1970 141.5
1971 126.3
1972 119.6
1973 115.9
1974 115.8
1975 72.44
1976 93.92
1977 82.8
1978 71.49
1979 69.01
1980 76.22
1981 66.73
1982 43.58
1983 12.16
1984 17.51
1985 17.55
1986 17.2
1987 18.45
1988 20.41
1989 20.94
1990 19.18
1991 20.51
1992 20.42
1993 17.91
1994 15.96
1995 14.88
1996 14.08
1997 12.49
1998 16.23
1999 15.89
2000 16.39