Year	Kilotonnes
1850	0
1851	0.00006
1852	0.00011
1853	0.00017
1854	0.00023
1855	0.00028
1856	0.00034
1857	0.0004
1858	0.00046
1859	0.00051
1860	0.00057
1861	0.00063
1862	0.00069
1863	0.00074
1864	0.0008
1865	0.00086
1866	0.00092
1867	0.00097
1868	0.00103
1869	0.00109
1870	0.00115
1871	0.0012
1872	0.00126
1873	0.00132
1874	0.00138
1875	0.00144
1876	0.00149
1877	0.00155
1878	0.00161
1879	0.00167
1880	0.00173
1881	0.00266
1882	0.0036
1883	0.00453
1884	0.00547
1885	0.00641
1886	0.00734
1887	0.00829
1888	0.00923
1889	0.01017
1890	0.01111
1891	0.01163
1892	0.01201
1893	0.01226
1894	0.01233
1895	0.01222
1896	0.01743
1897	0.02261
1898	0.02774
1899	0.03332
1900	0.03873
1901	0.04645
1902	0.09291
1903	0.1394
1904	0.1858
1905	0.2323
1906	0.2787
1907	0.3252
1908	0.3716
1909	0.4181
1910	0.4645
1911	0.511
1912	0.5575
1913	0.6039
1914	0.6504
1915	0.6968
1916	0.7433
1917	0.7897
1918	0.8362
1919	0.8826
1920	0.9291
1921	0.9755
1922	1.022
1923	1.068
1924	1.115
1925	1.161
1926	1.208
1927	1.254
1928	1.301
1929	1.347
1930	1.394
1931	1.44
1932	1.487
1933	1.533
1934	1.579
1935	1.626
1936	1.672
1937	1.719
1938	1.765
1939	1.812
1940	1.858
1941	1.903
1942	1.947
1943	1.988
1944	2.025
1945	2.061
1946	2.068
1947	2.092
1948	2.116
1949	2.129
1950	5.572
1951	9.015
1952	12.46
1953	15.9
1954	19.34
1955	56.38
1956	56.53
1957	49.1
1958	39.83
1959	42.9
1960	40.91
1961	47.47
1962	51.63
1963	51.22
1964	51.37
1965	48.28
1966	45.47
1967	39.4
1968	32.07
1969	39.04
1970	40.69
1971	21.53
1972	18.74
1973	17.43
1974	16.47
1975	9.268
1976	8.775
1977	11.52
1978	11.04
1979	11.36
1980	17.55
1981	15.62
1982	18.3
1983	16.53
1984	16.21
1985	15.89
1986	16.19
1987	17.3
1988	17.21
1989	16
1990	16.98
1991	16.31
1992	20.98
1993	16.56
1994	15.82
1995	18.27
1996	23.25
1997	26.98
1998	27.68
1999	30.19
2000	33.54