Year Kilotonnes
1850 0.00117
1851 0.00117
1852 0.00234
1853 0.00351
1854 0.00468
1855 0.00585
1856 0.00702
1857 0.0082
1858 0.00937
1859 0.01055
1860 0.01172
1861 0.02331
1862 0.03489
1863 0.04647
1864 0.05806
1865 0.06964
1866 0.08123
1867 0.09282
1868 0.1044
1869 0.116
1870 0.1276
1871 0.1392
1872 0.1512
1873 0.1633
1874 0.1754
1875 0.1874
1876 0.1995
1877 0.2116
1878 0.2237
1879 0.2357
1880 0.2478
1881 0.2806
1882 0.2616
1883 0.2633
1884 0.265
1885 0.2916
1886 0.3182
1887 0.3448
1888 0.3726
1889 0.4142
1890 0.4379
1891 0.3689
1892 0.4759
1893 0.4157
1894 0.5168
1895 0.4562
1896 0.5131
1897 0.5782
1898 0.5979
1899 0.7511
1900 1.224
1901 1.308
1902 1.448
1903 2.075
1904 2.16
1905 2.272
1906 2.677
1907 2.734
1908 3.07
1909 4.439
1910 5.195
1911 6.23
1912 6.959
1913 6.235
1914 6.461
1915 7.345
1916 7.291
1917 6.552
1918 7.843
1919 8.294
1920 9.656
1921 12.25
1922 13.03
1923 15.36
1924 14.55
1925 15.69
1926 12.64
1927 12.38
1928 14.63
1929 18.26
1930 19.96
1931 20.82
1932 25.96
1933 26.62
1934 28.07
1935 30.88
1936 32.93
1937 35.26
1938 38.55
1939 39.22
1940 52.18
1941 52.24
1942 49.34
1943 50.6
1944 49.09
1945 49.65
1946 50.81
1947 53.22
1948 53.88
1949 55.55
1950 45.43
1951 46.3
1952 49.78
1953 53.1
1954 57.06
1955 63.04
1956 67.58
1957 69.56
1958 61.43
1959 68.53
1960 65.34
1961 57.38
1962 53.24
1963 51.88
1964 36.68
1965 42.56
1966 46.09
1967 41.67
1968 46.89
1969 51.53
1970 63.84
1971 66.04
1972 61.18
1973 70.1
1974 70.39
1975 64.82
1976 68.21
1977 65.32
1978 61.19
1979 64
1980 69.64
1981 63.36
1982 58.44
1983 54.53
1984 58.2
1985 60.22
1986 69.8
1987 86.72
1988 79.32
1989 81.92
1990 81.89
1991 96.73
1992 104.9
1993 90.51
1994 85.28
1995 80.61
1996 76.83
1997 71.82
1998 76.58
1999 85
2000 84