Year Kilotonnes
1850 0.00309
1851 0.00346
1852 0.00443
1853 0.00886
1854 0.0133
1855 0.01775
1856 0.0222
1857 0.02666
1858 0.03113
1859 0.0356
1860 0.04007
1861 0.04455
1862 0.04904
1863 0.05353
1864 0.05803
1865 0.06254
1866 0.06705
1867 0.07156
1868 0.07609
1869 0.08061
1870 0.08515
1871 0.08969
1872 0.09423
1873 0.09878
1874 0.1033
1875 0.1079
1876 0.1125
1877 0.117
1878 0.1216
1879 0.1262
1880 0.1308
1881 0.1354
1882 0.14
1883 0.1446
1884 0.1492
1885 0.1539
1886 0.1585
1887 0.1631
1888 0.1678
1889 0.1724
1890 0.177
1891 0.1817
1892 0.1864
1893 0.191
1894 0.1957
1895 0.1852
1896 0.1372
1897 0.185
1898 0.1926
1899 0.2003
1900 0.2475
1901 0.3076
1902 0.3482
1903 0.3187
1904 0.3288
1905 0.3809
1906 0.3805
1907 0.5673
1908 0.5649
1909 0.616
1910 0.6221
1911 0.5972
1912 0.6675
1913 0.7111
1914 1.147
1915 1.583
1916 2.018
1917 2.454
1918 2.89
1919 3.325
1920 3.761
1921 4.197
1922 5.655
1923 3.399
1924 4.1
1925 4.589
1926 5.071
1927 5.491
1928 6.684
1929 7.771
1930 9.163
1931 9.909
1932 9.542
1933 8.904
1934 9.995
1935 11.17
1936 11.77
1937 11.36
1938 13.21
1939 14.34
1940 14.87
1941 15.85
1942 12.19
1943 10.54
1944 9.007
1945 7.579
1946 5.538
1947 11.45
1948 16.47
1949 20.07
1950 23.64
1951 26.23
1952 23.27
1953 22.68
1954 21
1955 23.55
1956 25.12
1957 28.42
1958 30.05
1959 30.88
1960 33.91
1961 36.14
1962 38.41
1963 40.17
1964 45.08
1965 49.09
1966 48.38
1967 49.91
1968 46.81
1969 49.19
1970 50.85
1971 56.37
1972 60.75
1973 59.84
1974 64.5
1975 66.21
1976 70.01
1977 70.73
1978 69.9
1979 71.79
1980 75
1981 75.37
1982 75.55
1983 81.28
1984 84.24
1985 88.3
1986 86.82
1987 89.41
1988 92.73
1989 93.47
1990 90
1991 54
1992 53.35
1993 56.85
1994 44.65
1995 35.2
1996 33.1
1997 40.2
1998 44.75
1999 45.35
2000 29.05