Year	Kilotonnes
1850	0
1851	0.0006
1852	0.00119
1853	0.00179
1854	0.00239
1855	0.00298
1856	0.00358
1857	0.00418
1858	0.00478
1859	0.00538
1860	0.00598
1861	0.00658
1862	0.00718
1863	0.00779
1864	0.00839
1865	0.00899
1866	0.00959
1867	0.0102
1868	0.0108
1869	0.0114
1870	0.01201
1871	0.01261
1872	0.01322
1873	0.01382
1874	0.01443
1875	0.01504
1876	0.01565
1877	0.01625
1878	0.01686
1879	0.01747
1880	0.01808
1881	0.02787
1882	0.03766
1883	0.04746
1884	0.05727
1885	0.06709
1886	0.07692
1887	0.08676
1888	0.09661
1889	0.1065
1890	0.1163
1891	0.1217
1892	0.1258
1893	0.1283
1894	0.1291
1895	0.1279
1896	0.1826
1897	0.2368
1898	0.2905
1899	0.349
1900	0.4056
1901	0.4864
1902	0.9729
1903	1.459
1904	1.946
1905	2.432
1906	2.919
1907	3.405
1908	3.892
1909	4.378
1910	4.864
1911	5.351
1912	5.837
1913	6.324
1914	6.81
1915	7.297
1916	7.783
1917	8.27
1918	8.756
1919	9.243
1920	9.729
1921	10.22
1922	10.7
1923	11.19
1924	11.67
1925	12.16
1926	12.65
1927	13.13
1928	13.62
1929	14.11
1930	14.59
1931	15.08
1932	15.57
1933	16.05
1934	16.54
1935	17.03
1936	17.51
1937	18
1938	18.49
1939	18.97
1940	19.46
1941	19.93
1942	20.39
1943	20.82
1944	21.21
1945	21.59
1946	21.65
1947	21.91
1948	22.16
1949	22.29
1950	21.13
1951	19.97
1952	18.8
1953	17.64
1954	16.48
1955	15.32
1956	14.15
1957	12.99
1958	11.83
1959	10.67
1960	9.502
1961	8.34
1962	7.177
1963	6.015
1964	4.852
1965	3.689
1966	2.527
1967	3.314
1968	4.1
1969	4.887
1970	5.674
1971	6.461
1972	7.248
1973	8.035
1974	8.821
1975	9.608
1976	10.4
1977	11.18
1978	11.97
1979	12.76
1980	13.54
1981	14.33
1982	15.12
1983	15.9
1984	22.62
1985	24.93
1986	25
1987	24.65
1988	25.14
1989	25.33
1990	25.53
1991	29.73
1992	34.32
1993	39.36
1994	43.53
1995	48.13
1996	52.67
1997	58.79
1998	64.5
1999	70.73
2000	78.05