Year	Kilotonnes
1850	0
1851	0.00008
1852	0.00017
1853	0.00025
1854	0.00034
1855	0.00042
1856	0.00051
1857	0.00059
1858	0.00068
1859	0.00076
1860	0.00085
1861	0.00093
1862	0.00102
1863	0.0011
1864	0.00119
1865	0.00127
1866	0.00136
1867	0.00145
1868	0.00153
1869	0.00162
1870	0.0017
1871	0.00179
1872	0.00187
1873	0.00196
1874	0.00204
1875	0.00213
1876	0.00222
1877	0.0023
1878	0.00239
1879	0.00248
1880	0.00256
1881	0.00395
1882	0.00534
1883	0.00673
1884	0.00812
1885	0.00951
1886	0.0109
1887	0.01229
1888	0.01369
1889	0.01509
1890	0.01649
1891	0.01725
1892	0.01783
1893	0.01819
1894	0.0183
1895	0.01813
1896	0.02587
1897	0.03355
1898	0.04117
1899	0.04945
1900	0.05747
1901	0.06893
1902	0.1074
1903	0.1514
1904	0.2587
1905	0.2357
1906	0.2733
1907	0.3252
1908	0.3628
1909	0.386
1910	0.399
1911	0.427
1912	0.5368
1913	0.6114
1914	0.4795
1915	0.3581
1916	0.5978
1917	0.5594
1918	0.5051
1919	0.3843
1920	0.4614
1921	0.4539
1922	0.5438
1923	0.6198
1924	0.6538
1925	0.6508
1926	0.836
1927	0.8148
1928	0.8135
1929	0.7932
1930	0.7423
1931	0.7408
1932	1.188
1933	1.615
1934	1.226
1935	1.492
1936	2.046
1937	2.337
1938	2.942
1939	2.915
1940	2.28
1941	2.263
1942	1.899
1943	1.498
1944	1.975
1945	2.108
1946	2.423
1947	2.862
1948	3.087
1949	3.417
1950	5.482
1951	19.16
1952	23.39
1953	23.18
1954	24.73
1955	25.15
1956	23.89
1957	22.6
1958	24.76
1959	25.49
1960	36.46
1961	36.22
1962	41.71
1963	48.35
1964	55.49
1965	64.69
1966	68.92
1967	85.04
1968	89.14
1969	93.98
1970	122.9
1971	135
1972	129.6
1973	142.4
1974	135.3
1975	120
1976	77.21
1977	83.12
1978	83.97
1979	84.99
1980	87.68
1981	79.26
1982	105.6
1983	109.8
1984	117.2
1985	115.8
1986	123.6
1987	128.1
1988	134.8
1989	136.1
1990	140.3
1991	152.3
1992	160.1
1993	167.4
1994	176.2
1995	185.2
1996	192.6
1997	198.8
1998	203.6
1999	209.6
2000	217.8