Year Kilotonnes
1850 0
1851 0
1852 0
1853 0
1854 0
1855 0.00001
1856 0.00001
1857 0.00001
1858 0.00001
1859 0.00001
1860 0.00001
1861 0.00001
1862 0.00001
1863 0.00001
1864 0.00002
1865 0.00002
1866 0.00002
1867 0.00002
1868 0.00002
1869 0.00002
1870 0.00002
1871 0.00002
1872 0.00003
1873 0.00003
1874 0.00003
1875 0.00003
1876 0.00003
1877 0.00003
1878 0.00003
1879 0.00003
1880 0.00003
1881 0.00005
1882 0.00007
1883 0.00009
1884 0.00011
1885 0.00013
1886 0.00015
1887 0.00016
1888 0.00018
1889 0.0002
1890 0.00022
1891 0.00023
1892 0.00024
1893 0.00024
1894 0.00024
1895 0.00024
1896 0.00035
1897 0.00045
1898 0.00055
1899 0.00066
1900 0.00077
1901 0.00092
1902 0.00144
1903 0.00202
1904 0.00346
1905 0.00315
1906 0.00365
1907 0.00435
1908 0.00485
1909 0.00516
1910 0.00534
1911 0.00571
1912 0.00718
1913 0.00817
1914 0.00641
1915 0.00479
1916 0.00799
1917 0.00748
1918 0.00675
1919 0.00514
1920 0.00617
1921 0.00607
1922 0.01214
1923 0.01822
1924 0.2628
1925 0.2675
1926 0.654
1927 1.628
1928 1.754
1929 2.022
1930 2.765
1931 1.721
1932 3.715
1933 4.53
1934 3.601
1935 4.543
1936 6.01
1937 7.707
1938 6.871
1939 10.22
1940 10.62
1941 9.055
1942 9.85
1943 10.43
1944 12.76
1945 13.68
1946 14.55
1947 18.58
1948 23.4
1949 22.66
1950 19.92
1951 23.62
1952 30.66
1953 37.36
1954 34.41
1955 32.06
1956 34.63
1957 35.3
1958 37.47
1959 35.04
1960 35.57
1961 35
1962 35.18
1963 39.27
1964 43.2
1965 44.44
1966 47.33
1967 46.18
1968 47.44
1969 44.95
1970 48.98
1971 50.35
1972 56.31
1973 60.24
1974 64.62
1975 63.39
1976 60.64
1977 67.91
1978 72.87
1979 87.13
1980 85.71
1981 97.04
1982 107.9
1983 105.2
1984 107
1985 110.1
1986 98.59
1987 101.6
1988 102.5
1989 106.8
1990 106.9
1991 105.8
1992 109
1993 108.5
1994 109.4
1995 119.4
1996 118.4
1997 122.3
1998 125.7
1999 136
2000 140.8