Year	Kilotonnes
1850	0
1851	0.00017
1852	0.00034
1853	0.00051
1854	0.00069
1855	0.00086
1856	0.00103
1857	0.0012
1858	0.00137
1859	0.00154
1860	0.00172
1861	0.00188
1862	0.00204
1863	0.0022
1864	0.00236
1865	0.00252
1866	0.00268
1867	0.00283
1868	0.00298
1869	0.00314
1870	0.00329
1871	0.00374
1872	0.00419
1873	0.00464
1874	0.00509
1875	0.00615
1876	0.00672
1877	0.0072
1878	0.00798
1879	0.00873
1880	0.00915
1881	0.00951
1882	0.01003
1883	0.01082
1884	0.01202
1885	0.01325
1886	0.01326
1887	0.01448
1888	0.01588
1889	0.01782
1890	0.0191
1891	0.0209
1892	0.02218
1893	0.0216
1894	0.02465
1895	0.02681
1896	0.02837
1897	0.2696
1898	0.6103
1899	0.426
1900	0.5966
1901	0.9378
1902	1.379
1903	1.152
1904	1.181
1905	1.352
1906	1.466
1907	1.922
1908	2.194
1909	2.622
1910	3.307
1911	3.637
1912	3.98
1913	4.595
1914	4.94
1915	5.456
1916	7.458
1917	9.69
1918	11.55
1919	15.68
1920	16.43
1921	14.86
1922	19.29
1923	20.7
1924	21.58
1925	24.44
1926	25.74
1927	25.82
1928	22.73
1929	21.96
1930	27.33
1931	24.67
1932	23.07
1933	26.13
1934	25.89
1935	26.92
1936	28.97
1937	31.92
1938	35.4
1939	41.4
1940	44.54
1941	44.66
1942	37.41
1943	35.64
1944	30.9
1945	14.65
1946	18.27
1947	21.94
1948	26.82
1949	26.23
1950	23.97
1951	29.85
1952	38.96
1953	38.22
1954	37.39
1955	42.01
1956	44.15
1957	50.97
1958	54.74
1959	61.39
1960	65.54
1961	69.43
1962	76.47
1963	80.25
1964	83.38
1965	87.36
1966	88.17
1967	90.93
1968	95.97
1969	96.28
1970	97.04
1971	91.97
1972	94.38
1973	97.64
1974	95.08
1975	89.24
1976	114.5
1977	127.9
1978	147.7
1979	152.7
1980	201.1
1981	194.5
1982	184.2
1983	179.3
1984	187.6
1985	201.9
1986	212.4
1987	216.5
1988	238.3
1989	252.2
1990	252.3
1991	245.2
1992	253
1993	243.8
1994	257.6
1995	227.1
1996	191
1997	174.1
1998	178.3
1999	176.6
2000	187.9