Year	Kilotonnes
1850	0.1237
1851	0.08251
1852	0.1552
1853	0.1397
1854	0.1732
1855	0.1675
1856	0.2305
1857	0.264
1858	0.2779
1859	0.2624
1860	0.3743
1861	0.3685
1862	0.4118
1863	0.3668
1864	0.4688
1865	0.463
1866	0.3885
1867	0.4905
1868	0.4749
1869	0.5768
1870	0.5121
1871	0.467
1872	0.5689
1873	0.5049
1874	0.5684
1875	0.573
1876	0.6164
1877	0.5422
1878	0.5855
1879	0.5701
1880	0.5157
1881	0.5214
1882	0.5739
1883	0.4273
1884	0.5671
1885	0.524
1886	0.4889
1887	0.4152
1888	0.5067
1889	0.4055
1890	0.4434
1891	0.4133
1892	0.8269
1893	1.241
1894	1.655
1895	2.07
1896	2.484
1897	2.9
1898	3.315
1899	3.731
1900	4.147
1901	4.637
1902	5.128
1903	5.619
1904	6.11
1905	6.602
1906	7.093
1907	7.585
1908	8.078
1909	8.57
1910	9.062
1911	9.555
1912	10.05
1913	10.54
1914	11.04
1915	11.53
1916	12.02
1917	12.52
1918	13.01
1919	13.51
1920	14
1921	12.34
1922	18.23
1923	15.15
1924	14.15
1925	17.54
1926	16.91
1927	16.4
1928	15.76
1929	17.62
1930	18.19
1931	21.5
1932	24.95
1933	29.1
1934	32.4
1935	36.93
1936	29.86
1937	35.27
1938	41.59
1939	47.42
1940	59.64
1941	62.74
1942	77.38
1943	90.77
1944	83.41
1945	90.28
1946	83.63
1947	87.41
1948	88.73
1949	93.12
1950	112.3
1951	113.4
1952	109.8
1953	108.6
1954	111.5
1955	187.4
1956	206.4
1957	201.7
1958	195.4
1959	194.8
1960	216.8
1961	233.7
1962	285
1963	288.2
1964	295.2
1965	296.3
1966	324.5
1967	336.4
1968	366.3
1969	394
1970	415.8
1971	423.1
1972	465.9
1973	559.5
1974	633.6
1975	634.9
1976	674.3
1977	760.5
1978	806.9
1979	914.5
1980	930.7
1981	937.8
1982	903
1983	905.8
1984	1031
1985	1031
1986	1017
1987	1049
1988	1067
1989	1034
1990	946.5
1991	941.5
1992	971.9
1993	1023
1994	1029
1995	1025
1996	1045
1997	1090
1998	1112
1999	1132
2000	1181