Year Kilotonnes
1850 0
1851 0.01657
1852 0.03314
1853 0.0497
1854 0.06627
1855 0.08284
1856 0.09949
1857 0.1161
1858 0.1328
1859 0.1494
1860 0.1661
1861 0.1827
1862 0.1994
1863 0.2161
1864 0.2328
1865 0.2496
1866 0.2663
1867 0.283
1868 0.2998
1869 0.3166
1870 0.3334
1871 0.3502
1872 0.367
1873 0.3838
1874 0.4006
1875 0.4175
1876 0.4343
1877 0.4512
1878 0.4681
1879 0.485
1880 0.5019
1881 0.7736
1882 1.045
1883 1.318
1884 1.59
1885 1.862
1886 2.135
1887 2.408
1888 2.682
1889 2.956
1890 3.23
1891 3.379
1892 3.492
1893 3.563
1894 3.585
1895 3.551
1896 5.682
1897 7.813
1898 9.944
1899 12.07
1900 14.21
1901 17.06
1902 27.01
1903 40.5
1904 68.16
1905 60.36
1906 70.29
1907 83.74
1908 93.64
1909 100
1910 102.8
1911 109.2
1912 140.3
1913 157.2
1914 121.2
1915 85.23
1916 151.5
1917 133.2
1918 114.9
1919 82.53
1920 106.5
1921 98.57
1922 122.1
1923 138.4
1924 144.3
1925 139.9
1926 170.8
1927 161.9
1928 159.2
1929 148.8
1930 134
1931 135.4
1932 266.6
1933 385.9
1934 248.9
1935 264.4
1936 401.6
1937 460.5
1938 630.5
1939 617.6
1940 460.5
1941 473.2
1942 337.1
1943 187.1
1944 293.2
1945 298.5
1946 361.6
1947 455.6
1948 476.4
1949 519.8
1950 541
1951 602.9
1952 125.3
1953 96
1954 99.71
1955 91.34
1956 80.58
1957 97.97
1958 70.97
1959 61.1
1960 63.54
1961 63.09
1962 51.48
1963 69.55
1964 158.9
1965 167
1966 168.2
1967 145.3
1968 135.3
1969 152.9
1970 191.4
1971 187.7
1972 133.3
1973 155.5
1974 153
1975 92.4
1976 130.7
1977 128.4
1978 135.9
1979 184.4
1980 245.9
1981 215
1982 150.3
1983 164.7
1984 130.4
1985 126.1
1986 117.8
1987 140.1
1988 156.4
1989 87.62
1990 102.7
1991 92.56
1992 94.38
1993 96.28
1994 99.35
1995 107.8
1996 110.1
1997 110.5
1998 115.6
1999 110.3
2000 114.9