Year	Kilotonnes
1850	119.9
1851	152.1
1852	168.2
1853	192.7
1854	228.1
1855	248.2
1856	263.8
1857	274.2
1858	282
1859	307.5
1860	323.3
1861	313.5
1862	327.3
1863	374.2
1864	399.9
1865	403.8
1866	470
1867	489.5
1868	551.4
1869	617.9
1870	652.9
1871	682.2
1872	823.4
1873	902.9
1874	874.2
1875	889.7
1876	875.7
1877	959.7
1878	939.3
1879	1125
1880	1264
1881	1338
1882	1494
1883	1631
1884	1724
1885	1752
1886	1807
1887	2059
1888	2339
1889	2238
1890	2497
1891	2667
1892	2849
1893	2873
1894	2711
1895	3049
1896	3080
1897	3213
1898	3505
1899	3998
1900	4225
1901	4564
1902	4752
1903	5596
1904	5541
1905	6181
1906	6493
1907	7417
1908	6522
1909	7276
1910	7853
1911	7775
1912	8357
1913	8878
1914	8045
1915	8490
1916	9598
1917	10420
1918	10870
1919	8822
1920	10300
1921	8017
1922	8135
1923	10800
1924	9638
1925	9827
1926	10680
1927	10410
1928	9901
1929	10500
1930	9097
1931	7518
1932	6059
1933	6414
1934	6926
1935	7200
1936	8497
1937	8799
1938	7018
1939	7948
1940	9065
1941	10390
1942	11150
1943	12200
1944	12310
1945	11820
1946	10590
1947	11950
1948	11030
1949	9451
1950	10160
1951	9758
1952	9462
1953	9505
1954	9169
1955	9488
1956	9559
1957	9665
1958	10280
1959	10290
1960	10100
1961	10060
1962	10430
1963	10960
1964	11500
1965	12150
1966	13110
1967	12950
1968	13750
1969	14070
1970	14170
1971	13490
1972	13810
1973	14420
1974	13650
1975	12730
1976	12910
1977	12990
1978	12190
1979	12230
1980	11770
1981	11150
1982	10540
1983	10270
1984	10690
1985	10580
1986	10220
1987	10110
1988	10300
1989	10360
1990	10480
1991	10160
1992	10030
1993	9884
1994	9691
1995	8453
1996	8347
1997	8553
1998	8601
1999	7965
2000	7422