Year	Kilotonnes
1850	0.00001
1851	0.00001
1852	0.00002
1853	0.00003
1854	0.00003
1855	0.00004
1856	0.00005
1857	0.00006
1858	0.00007
1859	0.00008
1860	0.00009
1861	0.00017
1862	0.00025
1863	0.00034
1864	0.00042
1865	0.00051
1866	0.00059
1867	0.00068
1868	0.00076
1869	0.00085
1870	0.00093
1871	0.00102
1872	0.00111
1873	0.00119
1874	0.00128
1875	0.00137
1876	0.00146
1877	0.00154
1878	0.00163
1879	0.00172
1880	0.00181
1881	0.00205
1882	0.00191
1883	0.00192
1884	0.00194
1885	0.00213
1886	0.00232
1887	0.00252
1888	0.00272
1889	0.00302
1890	0.0032
1891	0.00269
1892	0.00348
1893	0.00304
1894	0.00377
1895	0.00333
1896	0.00375
1897	0.00422
1898	0.00437
1899	0.00441
1900	0.00526
1901	0.00573
1902	0.00302
1903	0.00331
1904	0.00393
1905	0.00427
1906	0.00417
1907	0.00452
1908	0.00592
1909	0.00543
1910	0.00648
1911	0.00563
1912	0.00645
1913	0.00737
1914	0.00797
1915	0.00911
1916	0.01002
1917	0.00861
1918	0.00924
1919	0.01011
1920	0.01061
1921	0.01455
1922	0.015
1923	0.01837
1924	0.01939
1925	0.01921
1926	0.01887
1927	0.02063
1928	0.0214
1929	0.02408
1930	0.02621
1931	0.02161
1932	0.01802
1933	0.02174
1934	0.02624
1935	0.02812
1936	0.02916
1937	0.03716
1938	0.03571
1939	0.03804
1940	0.03536
1941	0.03647
1942	0.03717
1943	0.03729
1944	0.03623
1945	0.03592
1946	0.0348
1947	0.03678
1948	0.04279
1949	0.0443
1950	0.0463
1951	0.04612
1952	0.05078
1953	0.05312
1954	0.05458
1955	0.05762
1956	0.06357
1957	0.06503
1958	0.06644
1959	0.06921
1960	0.0642
1961	0.06736
1962	0.07007
1963	0.06781
1964	0.0772
1965	0.08419
1966	0.08378
1967	0.08147
1968	0.08777
1969	0.08553
1970	0.3501
1971	8.109
1972	8.216
1973	8.023
1974	8.986
1975	8.404
1976	9.4
1977	9.205
1978	9.09
1979	9.573
1980	9.678
1981	9.793
1982	9.831
1983	10.08
1984	9.684
1985	10.23
1986	9.352
1987	9.621
1988	9.655
1989	10.16
1990	10.24
1991	11.39
1992	11.01
1993	11.94
1994	11.52
1995	11.52
1996	11.31
1997	10.98
1998	10.75
1999	10.75
2000	11.41