Year	Kilotonnes
1850	0
1851	0
1852	0.00001
1853	0.00001
1854	0.00001
1855	0.00002
1856	0.00002
1857	0.00002
1858	0.00003
1859	0.00003
1860	0.00003
1861	0.00006
1862	0.0001
1863	0.00013
1864	0.00016
1865	0.00019
1866	0.00022
1867	0.00025
1868	0.00028
1869	0.00032
1870	0.00035
1871	0.00038
1872	0.00041
1873	0.00045
1874	0.00048
1875	0.00051
1876	0.00054
1877	0.00058
1878	0.00061
1879	0.00064
1880	0.00068
1881	0.00076
1882	0.00071
1883	0.00072
1884	0.00072
1885	0.0008
1886	0.00087
1887	0.00094
1888	0.00102
1889	0.00113
1890	0.00119
1891	0.00101
1892	0.0013
1893	0.00113
1894	0.00141
1895	0.00124
1896	0.0014
1897	0.00158
1898	0.00163
1899	0.00164
1900	0.00196
1901	0.00214
1902	0.00428
1903	0.00642
1904	0.00857
1905	0.01071
1906	0.01286
1907	0.01501
1908	0.01716
1909	0.01931
1910	0.02146
1911	0.02362
1912	0.02578
1913	0.02793
1914	0.03009
1915	0.03226
1916	0.03442
1917	0.03658
1918	0.03875
1919	0.04092
1920	0.04309
1921	0.04526
1922	0.04743
1923	0.0496
1924	0.05178
1925	0.05395
1926	0.05613
1927	0.05831
1928	0.06049
1929	0.06268
1930	0.06486
1931	0.06705
1932	0.06923
1933	0.07142
1934	0.07362
1935	0.07581
1936	0.078
1937	0.0802
1938	0.08239
1939	0.08459
1940	0.08679
1941	0.08899
1942	0.0912
1943	0.0934
1944	0.09561
1945	0.09782
1946	0.1
1947	0.1022
1948	0.1044
1949	0.1067
1950	0.1388
1951	0.1806
1952	0.235
1953	0.3057
1954	0.3978
1955	0.5176
1956	0.6734
1957	0.8762
1958	1.14
1959	1.483
1960	1.93
1961	2.511
1962	3.268
1963	4.252
1964	5.532
1965	6.007
1966	6.873
1967	4.632
1968	4.044
1969	2.715
1970	3.821
1971	3.717
1972	3.794
1973	4.501
1974	4.687
1975	4.718
1976	5.385
1977	5.723
1978	6.595
1979	7.231
1980	7.332
1981	6.446
1982	6.496
1983	6.741
1984	7.045
1985	7.426
1986	7.306
1987	7.31
1988	7.422
1989	7.339
1990	7.768
1991	8.526
1992	7.242
1993	8.073
1994	6.679
1995	8.216
1996	8.555
1997	8.692
1998	8.876
1999	9.047
2000	8.819