Year	Kilotonnes
1850	0.00013
1851	0.00013
1852	0.00027
1853	0.0004
1854	0.00054
1855	0.00067
1856	0.0008
1857	0.00094
1858	0.00107
1859	0.00121
1860	0.00134
1861	0.00267
1862	0.00399
1863	0.00532
1864	0.00665
1865	0.00797
1866	0.0093
1867	0.01063
1868	0.01195
1869	0.01328
1870	0.0146
1871	0.01593
1872	0.01731
1873	0.01869
1874	0.02008
1875	0.02146
1876	0.02284
1877	0.02422
1878	0.0256
1879	0.02699
1880	0.02837
1881	0.03212
1882	0.02995
1883	0.03014
1884	0.03034
1885	0.03338
1886	0.03643
1887	0.03947
1888	0.04265
1889	0.04741
1890	0.05012
1891	0.04223
1892	0.05448
1893	0.04759
1894	0.05916
1895	0.05223
1896	0.05874
1897	0.06619
1898	0.06844
1899	0.06904
1900	0.08248
1901	0.08984
1902	0.04736
1903	0.05185
1904	0.06158
1905	0.06688
1906	0.06538
1907	0.07081
1908	0.09285
1909	0.0851
1910	0.1015
1911	0.08824
1912	0.1011
1913	0.1155
1914	0.1249
1915	0.1428
1916	0.157
1917	0.1349
1918	0.1448
1919	0.1584
1920	0.1662
1921	0.228
1922	0.2351
1923	0.288
1924	0.3039
1925	0.3011
1926	0.2957
1927	0.3233
1928	0.3355
1929	0.3774
1930	0.4109
1931	0.3387
1932	0.2824
1933	0.3408
1934	0.4113
1935	0.4407
1936	0.4571
1937	0.5824
1938	0.5597
1939	0.5962
1940	0.5543
1941	0.5715
1942	0.5826
1943	0.5845
1944	0.5678
1945	0.563
1946	0.5455
1947	0.5764
1948	0.6707
1949	0.6943
1950	0.7257
1951	0.7229
1952	0.7959
1953	0.8326
1954	0.8554
1955	0.9031
1956	0.9963
1957	1.019
1958	1.041
1959	1.085
1960	1.006
1961	1.056
1962	1.098
1963	1.063
1964	1.21
1965	1.319
1966	1.313
1967	1.277
1968	1.376
1969	1.341
1970	1.411
1971	1.462
1972	1.488
1973	1.612
1974	1.716
1975	1.553
1976	1.522
1977	1.637
1978	1.629
1979	1.698
1980	1.769
1981	1.807
1982	1.763
1983	1.738
1984	1.753
1985	1.76
1986	1.76
1987	1.801
1988	1.793
1989	1.801
1990	1.749
1991	1.769
1992	1.789
1993	1.81
1994	1.831
1995	1.852
1996	1.873
1997	1.894
1998	1.916
1999	1.938
2000	1.96