Year	Kilotonnes
1850	0
1851	0.00003
1852	0.00007
1853	0.0001
1854	0.00014
1855	0.00017
1856	0.00021
1857	0.00024
1858	0.00028
1859	0.00031
1860	0.00035
1861	0.00038
1862	0.00041
1863	0.00045
1864	0.00048
1865	0.00051
1866	0.00054
1867	0.00057
1868	0.00061
1869	0.00064
1870	0.00067
1871	0.00076
1872	0.00085
1873	0.00094
1874	0.00103
1875	0.00125
1876	0.00136
1877	0.00146
1878	0.00162
1879	0.00177
1880	0.00186
1881	0.00193
1882	0.00203
1883	0.00219
1884	0.00244
1885	0.00269
1886	0.00269
1887	0.00294
1888	0.00322
1889	0.00361
1890	0.00387
1891	0.00424
1892	0.0045
1893	0.00438
1894	0.005
1895	0.00544
1896	0.00575
1897	0.00594
1898	0.00681
1899	0.00726
1900	0.00802
1901	0.00901
1902	0.00981
1903	0.01033
1904	0.01086
1905	0.01157
1906	0.03762
1907	0.06369
1908	0.08977
1909	0.1159
1910	0.143
1911	0.1701
1912	0.2127
1913	0.2476
1914	0.3541
1915	0.4432
1916	0.3698
1917	0.367
1918	0.3643
1919	0.4322
1920	0.5604
1921	0.6032
1922	0.6151
1923	0.7376
1924	0.7748
1925	1.23
1926	1.528
1927	1.573
1928	1.725
1929	1.931
1930	1.838
1931	1.965
1932	2.298
1933	2.764
1934	3.578
1935	4.051
1936	4.689
1937	5.04
1938	6.908
1939	8.749
1940	11.84
1941	12.34
1942	13.73
1943	13.48
1944	14.23
1945	0.1503
1946	0.122
1947	0.3172
1948	0.9369
1949	11.08
1950	2.239
1951	1.962
1952	2.833
1953	5.809
1954	11.68
1955	16.84
1956	19.47
1957	23.68
1958	28.48
1959	33.84
1960	39.18
1961	42.77
1962	46.85
1963	49.39
1964	50.89
1965	58.67
1966	63.8
1967	69.24
1968	79.6
1969	83.84
1970	90.56
1971	119
1972	105
1973	112.1
1974	118.1
1975	123.4
1976	125.3
1977	128.9
1978	135.6
1979	138.7
1980	143.9
1981	144.5
1982	145.5
1983	161.4
1984	165.2
1985	174.3
1986	178.1
1987	178.1
1988	179.7
1989	185.7
1990	176.7
1991	164.6
1992	162.9
1993	142.8
1994	131.2
1995	128.4
1996	129.1
1997	125.8
1998	121.5
1999	117.3
2000	113