Year	Kilotonnes
1850	0
1851	0
1852	0.00001
1853	0.00001
1854	0.00001
1855	0.00002
1856	0.00002
1857	0.00002
1858	0.00003
1859	0.00003
1860	0.00003
1861	0.00004
1862	0.00004
1863	0.00004
1864	0.00005
1865	0.00005
1866	0.00005
1867	0.00006
1868	0.00006
1869	0.00006
1870	0.00007
1871	0.00007
1872	0.00007
1873	0.00008
1874	0.00008
1875	0.00008
1876	0.00009
1877	0.00009
1878	0.00009
1879	0.0001
1880	0.0001
1881	0.00016
1882	0.00021
1883	0.00027
1884	0.00032
1885	0.00038
1886	0.00043
1887	0.00049
1888	0.00054
1889	0.0006
1890	0.00065
1891	0.00068
1892	0.00071
1893	0.00072
1894	0.00073
1895	0.00072
1896	0.00103
1897	0.00133
1898	0.00163
1899	0.00196
1900	0.00228
1901	0.00274
1902	0.00426
1903	0.00601
1904	0.01027
1905	0.00936
1906	0.01085
1907	0.01291
1908	0.0144
1909	0.01532
1910	0.01584
1911	0.01695
1912	0.0213
1913	0.02426
1914	0.01903
1915	0.01421
1916	0.02373
1917	0.0222
1918	0.02005
1919	0.01525
1920	0.01831
1921	0.01801
1922	0.02158
1923	0.0246
1924	0.02595
1925	0.02583
1926	0.03318
1927	0.03234
1928	0.03229
1929	0.03148
1930	0.02946
1931	0.0294
1932	0.04714
1933	0.06408
1934	0.6248
1935	2.771
1936	10.17
1937	17
1938	18.15
1939	16.63
1940	15.49
1941	14.87
1942	13.64
1943	14.34
1944	14.57
1945	15.78
1946	16.97
1947	19.76
1948	22.68
1949	22.5
1950	110.2
1951	127.5
1952	132.5
1953	136.2
1954	140.4
1955	126.4
1956	114.9
1957	98.52
1958	100.4
1959	95.01
1960	98.48
1961	96.12
1962	98.82
1963	91.13
1964	77.79
1965	68.67
1966	67.02
1967	84.26
1968	78.45
1969	75.83
1970	80.98
1971	78.24
1972	69.4
1973	72.33
1974	78.32
1975	67.57
1976	63.67
1977	81.85
1978	74.3
1979	76
1980	80.21
1981	83.77
1982	55.73
1983	44.24
1984	51.38
1985	45.14
1986	57.87
1987	61.02
1988	60.09
1989	58.7
1990	58.06
1991	50.18
1992	48.47
1993	46.96
1994	46.36
1995	48.98
1996	49.45
1997	50.61
1998	51.1
1999	51.63
2000	51.49