Year	Kilotonnes
1850	0
1851	0.00001
1852	0.00003
1853	0.00004
1854	0.00006
1855	0.00007
1856	0.00008
1857	0.0001
1858	0.00011
1859	0.00013
1860	0.00014
1861	0.00016
1862	0.00017
1863	0.00018
1864	0.00019
1865	0.00021
1866	0.00022
1867	0.00023
1868	0.00025
1869	0.00026
1870	0.00027
1871	0.00031
1872	0.00035
1873	0.00038
1874	0.00042
1875	0.00051
1876	0.00055
1877	0.00059
1878	0.00066
1879	0.00072
1880	0.00075
1881	0.00078
1882	0.00083
1883	0.00089
1884	0.00099
1885	0.00109
1886	0.00109
1887	0.00119
1888	0.00131
1889	0.00147
1890	0.00158
1891	0.00172
1892	0.00183
1893	0.00178
1894	0.00203
1895	0.00221
1896	0.00234
1897	0.00241
1898	0.00277
1899	0.00295
1900	0.00326
1901	0.00367
1902	0.00399
1903	0.0042
1904	0.00442
1905	0.00471
1906	0.00645
1907	0.00689
1908	0.00737
1909	0.00744
1910	0.00771
1911	0.00826
1912	0.00933
1913	0.01056
1914	0.01102
1915	0.01093
1916	0.01253
1917	0.01362
1918	0.01403
1919	0.01565
1920	0.0124
1921	0.01318
1922	0.01362
1923	0.01477
1924	0.01563
1925	0.01583
1926	0.01593
1927	0.01678
1928	0.0172
1929	0.01765
1930	0.01764
1931	0.01664
1932	0.01611
1933	0.01717
1934	0.01891
1935	0.0201
1936	0.02137
1937	0.02205
1938	0.02228
1939	0.02409
1940	0.02714
1941	0.02881
1942	0.0288
1943	0.02754
1944	0.02696
1945	0.01675
1946	0.0137
1947	0.01548
1948	0.0162
1949	0.02136
1950	0.0245
1951	0.02889
1952	0.0332
1953	0.03584
1954	0.03811
1955	0.02698
1956	0.04388
1957	0.06004
1958	0.07013
1959	0.06692
1960	0.07964
1961	0.09179
1962	0.06618
1963	0.09651
1964	0.08133
1965	0.05368
1966	0.05287
1967	0.05212
1968	0.0512
1969	0.03867
1970	0.06596
1971	0.03765
1972	0.02474
1973	0.02393
1974	0.02402
1975	0.03677
1976	0.01202
1977	0.01164
1978	0.01099
1979	0.05073
1980	0.01333
1981	0.01299
1982	0.01187
1983	0.01152
1984	0.2265
1985	0.4414
1986	0.6564
1987	0.8714
1988	1.086
1989	1.301
1990	1.516
1991	1.624
1992	1.739
1993	1.863
1994	1.995
1995	2.137
1996	2.289
1997	2.452
1998	2.626
1999	2.813
2000	3.013