Year	Kilotonnes
1850	0.0001
1851	0.0001
1852	0.00019
1853	0.00029
1854	0.00039
1855	0.00048
1856	0.00058
1857	0.00068
1858	0.00077
1859	0.00087
1860	0.00097
1861	0.00192
1862	0.00288
1863	0.00383
1864	0.00479
1865	0.00575
1866	0.0067
1867	0.00766
1868	0.00862
1869	0.00957
1870	0.01053
1871	0.01148
1872	0.01248
1873	0.01348
1874	0.01447
1875	0.01547
1876	0.01646
1877	0.01746
1878	0.01846
1879	0.01945
1880	0.02045
1881	0.02316
1882	0.02159
1883	0.02173
1884	0.02187
1885	0.02407
1886	0.02626
1887	0.02846
1888	0.03075
1889	0.03418
1890	0.03613
1891	0.03044
1892	0.03927
1893	0.0343
1894	0.04265
1895	0.03765
1896	0.04234
1897	0.04771
1898	0.04934
1899	0.04977
1900	0.05946
1901	0.06476
1902	0.03414
1903	0.03738
1904	0.04439
1905	0.04821
1906	0.04713
1907	0.05105
1908	0.06693
1909	0.06135
1910	0.0732
1911	0.06361
1912	0.07288
1913	0.08329
1914	0.09003
1915	0.1029
1916	0.1132
1917	0.09723
1918	0.1044
1919	0.1142
1920	0.1198
1921	0.1644
1922	0.1695
1923	0.2076
1924	0.2191
1925	0.2171
1926	0.2132
1927	0.2331
1928	0.2418
1929	0.2721
1930	0.2962
1931	0.2441
1932	0.2036
1933	0.2457
1934	0.2965
1935	0.3177
1936	0.3295
1937	0.4198
1938	0.4035
1939	0.4298
1940	0.3996
1941	0.412
1942	0.42
1943	0.4213
1944	0.4093
1945	0.4059
1946	0.3932
1947	0.4155
1948	0.4835
1949	0.5005
1950	0.5231
1951	0.5211
1952	0.5737
1953	0.6002
1954	0.6167
1955	0.6511
1956	0.7182
1957	0.7347
1958	0.7507
1959	0.782
1960	0.7254
1961	0.7611
1962	0.7917
1963	0.7662
1964	0.8722
1965	0.9512
1966	0.9466
1967	0.9205
1968	0.9917
1969	0.9664
1970	1.017
1971	1.054
1972	0.9884
1973	1.029
1974	1.061
1975	1.037
1976	0.9625
1977	1.028
1978	1.607
1979	2.692
1980	2.242
1981	1.124
1982	1.296
1983	1.454
1984	1.711
1985	2.087
1986	2.535
1987	3.199
1988	3.806
1989	4.791
1990	5.9
1991	6.177
1992	6.265
1993	6.161
1994	6.059
1995	6.29
1996	6.311
1997	6.272
1998	6.512
1999	6.427
2000	6.594