Year	Kilotonnes
1850	0.00201
1851	0.00225
1852	0.00288
1853	0.00577
1854	0.00865
1855	0.01155
1856	0.01444
1857	0.01734
1858	0.02025
1859	0.02315
1860	0.02607
1861	0.02898
1862	0.0319
1863	0.03482
1864	0.03775
1865	0.04068
1866	0.04361
1867	0.04655
1868	0.04949
1869	0.05244
1870	0.05539
1871	0.05834
1872	0.0613
1873	0.06426
1874	0.06722
1875	0.07019
1876	0.07316
1877	0.07614
1878	0.07912
1879	0.0821
1880	0.08509
1881	0.08808
1882	0.09107
1883	0.09407
1884	0.09707
1885	0.1001
1886	0.1031
1887	0.1061
1888	0.1091
1889	0.1121
1890	0.1152
1891	0.1182
1892	0.1212
1893	0.1243
1894	0.1273
1895	0.1204
1896	0.08923
1897	0.1203
1898	0.1253
1899	0.1303
1900	0.161
1901	0.2001
1902	0.2265
1903	0.2073
1904	0.2139
1905	0.2477
1906	0.2475
1907	0.369
1908	0.3675
1909	0.4007
1910	0.4046
1911	0.3885
1912	0.4342
1913	0.4626
1914	0.746
1915	1.029
1916	1.313
1917	1.596
1918	1.88
1919	2.163
1920	2.447
1921	2.73
1922	3.679
1923	2.211
1924	2.667
1925	2.985
1926	3.299
1927	3.572
1928	4.348
1929	5.055
1930	5.961
1931	6.446
1932	6.207
1933	5.792
1934	6.502
1935	7.263
1936	7.659
1937	7.392
1938	8.592
1939	9.331
1940	9.673
1941	10.31
1942	7.929
1943	6.855
1944	5.859
1945	4.93
1946	3.602
1947	7.448
1948	10.72
1949	13.05
1950	15.38
1951	17.06
1952	15.14
1953	14.75
1954	13.66
1955	15.32
1956	16.34
1957	18.49
1958	19.55
1959	20.09
1960	22.06
1961	23.51
1962	24.99
1963	26.13
1964	29.32
1965	31.93
1966	31.47
1967	32.46
1968	30.45
1969	32
1970	33.07
1971	36.67
1972	39.52
1973	38.92
1974	41.96
1975	43.07
1976	45.54
1977	46.01
1978	45.47
1979	46.7
1980	48.79
1981	50.19
1982	50.4
1983	54.13
1984	54
1985	55.31
1986	55
1987	54.64
1988	55.42
1989	55.82
1990	54.59
1991	54.59
1992	52.57
1993	48.75
1994	47.52
1995	46.95
1996	52.5
1997	8.5
1998	52.5
1999	52.5
2000	52.6