Year	Kilotonnes
1850	25.64
1851	28.76
1852	35.93
1853	39.11
1854	43.63
1855	50.42
1856	58.43
1857	62.79
1858	72.12
1859	68.44
1860	72.65
1861	75.35
1862	85.83
1863	96.92
1864	107.8
1865	118.3
1866	119.3
1867	127.8
1868	144.1
1869	149.3
1870	159.6
1871	180.2
1872	195.1
1873	210.7
1874	223.6
1875	221.1
1876	226.7
1877	221.3
1878	231.4
1879	250.1
1880	280.7
1881	293.3
1882	307.1
1883	333.6
1884	345.5
1885	356.9
1886	366.5
1887	372.2
1888	406.4
1889	433.6
1890	455.4
1891	478.1
1892	462
1893	484.4
1894	493.5
1895	519.9
1896	551.2
1897	574
1898	616.9
1899	638.4
1900	675.5
1901	683.7
1902	669
1903	699.7
1904	711.3
1905	761
1906	797.3
1907	863.5
1908	899.2
1909	912.8
1910	911.2
1911	965.2
1912	1073
1913	1119
1914	952.2
1915	934.3
1916	1050
1917	1069
1918	1006
1919	747.8
1920	677.7
1921	598.8
1922	516.6
1923	344.1
1924	285.4
1925	261.6
1926	265.2
1927	330.9
1928	342
1929	398.5
1930	315.9
1931	294.3
1932	218.6
1933	212.6
1934	218.1
1935	217.3
1936	243
1937	294.4
1938	320.6
1939	145.4
1940	427.5
1941	714.5
1942	1053
1943	1478
1944	1344
1945	206.8
1946	1031
1947	1062
1948	756
1949	652.9
1950	519.7
1951	563.6
1952	592
1953	642.1
1954	675
1955	706.1
1956	758.7
1957	811.8
1958	802.2
1959	855.1
1960	899.4
1961	931.3
1962	970.5
1963	1036
1964	1084
1965	1110
1966	1135
1967	1146
1968	1199
1969	1280
1970	1360
1971	1437
1972	1509
1973	1568
1974	1607
1975	1775
1976	1850
1977	1932
1978	1983
1979	2035
1980	2050
1981	1869
1982	2048
1983	2044
1984	2044
1985	2150
1986	2100
1987	2100
1988	2090
1989	1955
1990	1605
1991	1578
1992	1410
1993	1362
1994	1302
1995	1188
1996	1184
1997	1090
1998	948.5
1999	859.5
2000	755.5