Year	Kilotonnes
1850	0
1851	0
1852	0
1853	0
1854	0
1855	0
1856	0
1857	0
1858	0
1859	0
1860	0
1861	0.00001
1862	0.00001
1863	0.00001
1864	0.00002
1865	0.00002
1866	0.00003
1867	0.00003
1868	0.00003
1869	0.00004
1870	0.00004
1871	0.00004
1872	0.00005
1873	0.00005
1874	0.00006
1875	0.00006
1876	0.00006
1877	0.00007
1878	0.00007
1879	0.00007
1880	0.00008
1881	0.00009
1882	0.00008
1883	0.00008
1884	0.00008
1885	0.00009
1886	0.0001
1887	0.00011
1888	0.00012
1889	0.00013
1890	0.00014
1891	0.00012
1892	0.00015
1893	0.00013
1894	0.00016
1895	0.00014
1896	0.00016
1897	0.00018
1898	0.00019
1899	0.00019
1900	0.00023
1901	0.00025
1902	0.00013
1903	0.00014
1904	0.00017
1905	0.00034
1906	0.00051
1907	0.00068
1908	0.00086
1909	0.00103
1910	0.0012
1911	0.00137
1912	0.00154
1913	0.00171
1914	0.00189
1915	0.00206
1916	0.00223
1917	0.0024
1918	0.00258
1919	0.00275
1920	0.00292
1921	0.0031
1922	0.00327
1923	0.00344
1924	0.00361
1925	0.00379
1926	0.00396
1927	0.00413
1928	0.00431
1929	0.00448
1930	0.00466
1931	0.00483
1932	0.00501
1933	0.00518
1934	0.00536
1935	0.00553
1936	0.0057
1937	0.00588
1938	0.00605
1939	0.00623
1940	0.00641
1941	0.00658
1942	0.00676
1943	0.00693
1944	0.00711
1945	0.00728
1946	0.00746
1947	0.00764
1948	0.00781
1949	0.00799
1950	0.00886
1951	0.00886
1952	0.00887
1953	0.00887
1954	0.00887
1955	0.00888
1956	0.00888
1957	0.00888
1958	0.00889
1959	0.01778
1960	0.1067
1961	0.0089
1962	0.0178
1963	0.02671
1964	0.03562
1965	0.2672
1966	0.6772
1967	0.7666
1968	0.9363
1969	1.026
1970	1.231
1971	1.339
1972	1.277
1973	1.251
1974	1.046
1975	1.135
1976	1.067
1977	1.068
1978	1.107
1979	1.104
1980	1.259
1981	1.23
1982	1.245
1983	1.213
1984	1.283
1985	1.295
1986	1.515
1987	1.542
1988	2.005
1989	2.157
1990	2.212
1991	2.307
1992	2.206
1993	2.332
1994	2.474
1995	2.355
1996	2.362
1997	2.383
1998	2.645
1999	2.612
2000	2.619