Year	Kilotonnes
1850	13.83
1851	15.81
1852	15.93
1853	18.4
1854	18.06
1855	18.5
1856	21.49
1857	25.32
1858	29.86
1859	32.5
1860	34.14
1861	27.46
1862	30.36
1863	33.27
1864	32.13
1865	32.96
1866	34.34
1867	36.39
1868	38.15
1869	39.82
1870	43.42
1871	45.2
1872	44.27
1873	47.72
1874	49.76
1875	52.57
1876	54.78
1877	55.88
1878	54.61
1879	53.97
1880	54.98
1881	58.68
1882	63.57
1883	67.93
1884	65.95
1885	66.76
1886	73.42
1887	77.61
1888	83.57
1889	89.83
1890	94.91
1891	100.6
1892	105.1
1893	105.9
1894	109.8
1895	111.3
1896	119.6
1897	124.5
1898	119.5
1899	126.5
1900	140.1
1901	150.3
1902	154.5
1903	154.1
1904	161.7
1905	166.3
1906	171.3
1907	170.8
1908	185.8
1909	193.5
1910	193.7
1911	195.9
1912	225.3
1913	229.7
1914	191.6
1915	198.3
1916	219
1917	217.1
1918	208
1919	198.1
1920	166.9
1921	201.6
1922	177.3
1923	184.4
1924	201.4
1925	214.7
1926	204.7
1927	238.2
1928	228.5
1929	247.4
1930	223.9
1931	212.7
1932	186.6
1933	173.8
1934	174.8
1935	180
1936	147.7
1937	120.9
1938	176.9
1939	162.6
1940	179.3
1941	207.7
1942	223.3
1943	238.8
1944	241.3
1945	254.6
1946	262.3
1947	288.7
1948	307.2
1949	330
1950	296.5
1951	307.9
1952	356.6
1953	381
1954	383.7
1955	380.3
1956	382.5
1957	473.5
1958	517.6
1959	468.3
1960	406.5
1961	440.9
1962	529.6
1963	568.2
1964	608.5
1965	642.1
1966	670
1967	755.6
1968	900.3
1969	860.8
1970	936.6
1971	1033
1972	1125
1973	1231
1974	1437
1975	1502
1976	1453
1977	1420
1978	1299
1979	1257
1980	1418
1981	1386
1982	1374
1983	1382
1984	1262
1985	1196
1986	1134
1987	1070
1988	893.5
1989	1061
1990	1089
1991	1082
1992	1068
1993	1005
1994	982
1995	904
1996	790.5
1997	869.5
1998	803.5
1999	820
2000	761