Year	Kilotonnes
1850	0
1851	0.00003
1852	0.00006
1853	0.00009
1854	0.00013
1855	0.00016
1856	0.00019
1857	0.00022
1858	0.00025
1859	0.00028
1860	0.00031
1861	0.00034
1862	0.00038
1863	0.00041
1864	0.00044
1865	0.00047
1866	0.0005
1867	0.00053
1868	0.00057
1869	0.0006
1870	0.00063
1871	0.00066
1872	0.00069
1873	0.00072
1874	0.00076
1875	0.00079
1876	0.00082
1877	0.00085
1878	0.00088
1879	0.00091
1880	0.00095
1881	0.00146
1882	0.00197
1883	0.00249
1884	0.003
1885	0.00351
1886	0.00403
1887	0.00454
1888	0.00506
1889	0.00558
1890	0.00609
1891	0.00638
1892	0.00659
1893	0.00672
1894	0.00676
1895	0.0067
1896	0.00956
1897	0.0124
1898	0.01522
1899	0.01828
1900	0.02124
1901	0.02548
1902	0.03971
1903	0.05597
1904	0.09563
1905	0.08713
1906	0.101
1907	0.1202
1908	0.1341
1909	0.1427
1910	0.1475
1911	0.1578
1912	0.1984
1913	0.2259
1914	0.1772
1915	0.1324
1916	0.2209
1917	0.2067
1918	0.1867
1919	0.142
1920	0.1705
1921	0.1678
1922	0.201
1923	0.2291
1924	0.2416
1925	0.2405
1926	0.309
1927	0.3011
1928	0.3007
1929	0.2932
1930	0.2743
1931	0.2738
1932	0.439
1933	0.5967
1934	0.4532
1935	0.5513
1936	0.7562
1937	0.8638
1938	1.087
1939	1.077
1940	0.8426
1941	0.8363
1942	0.7017
1943	0.5538
1944	0.73
1945	0.7791
1946	0.8956
1947	2.439
1948	7.02
1949	13.39
1950	24.06
1951	23.02
1952	20.41
1953	25.45
1954	32.52
1955	34.37
1956	26.55
1957	29.45
1958	98.26
1959	111.9
1960	135
1961	131.6
1962	154.8
1963	164.8
1964	129.7
1965	152
1966	148.3
1967	150.9
1968	163.7
1969	178.6
1970	232.8
1971	216.6
1972	176.7
1973	186.9
1974	181.5
1975	151.6
1976	231.7
1977	202.7
1978	246.9
1979	211.4
1980	207.3
1981	173
1982	228
1983	231.5
1984	242.8
1985	271.7
1986	297.1
1987	287.2
1988	318.9
1989	309.3
1990	65.15
1991	4661
1992	61.55
1993	80.84
1994	120.8
1995	118.6
1996	103.5
1997	103.4
1998	92.5
1999	88.82
2000	69.3