Year	Kilotonnes
1850	0.4021
1851	0.2683
1852	0.5047
1853	0.4543
1854	0.5632
1855	0.5447
1856	0.7493
1857	0.8582
1858	0.9035
1859	0.8531
1860	1.217
1861	1.198
1862	1.339
1863	1.192
1864	1.524
1865	1.505
1866	1.263
1867	1.595
1868	1.544
1869	1.875
1870	1.665
1871	1.518
1872	1.85
1873	1.642
1874	1.848
1875	1.863
1876	2.004
1877	1.763
1878	1.904
1879	1.854
1880	1.677
1881	1.695
1882	1.866
1883	1.389
1884	1.844
1885	1.704
1886	1.589
1887	1.35
1888	1.647
1889	1.318
1890	1.442
1891	1.344
1892	1.531
1893	1.703
1894	1.773
1895	1.793
1896	1.818
1897	1.83
1898	2.21
1899	2.415
1900	2.633
1901	3.444
1902	3.546
1903	4.041
1904	4.244
1905	4.242
1906	7.067
1907	9.888
1908	12.71
1909	12.7
1910	16.93
1911	16.92
1912	16.91
1913	12.68
1914	25.34
1915	37.99
1916	42.19
1917	46.38
1918	54.79
1919	33.7
1920	33.68
1921	33.49
1922	45.8
1923	45.54
1924	49.4
1925	49.12
1926	48.84
1927	56.65
1928	68.39
1929	56
1930	63.62
1931	51.39
1932	19.65
1933	27.34
1934	23.3
1935	23.16
1936	46.03
1937	49.56
1938	53.05
1939	41.42
1940	37.42
1941	37.04
1942	36.66
1943	25.4
1944	25.25
1945	32.53
1946	42.73
1947	46.05
1948	61.21
1949	69.23
1950	102.6
1951	111.1
1952	109
1953	116
1954	113.8
1955	127.5
1956	120.7
1957	196.2
1958	240.4
1959	207.7
1960	188.2
1961	159.9
1962	177
1963	183.6
1964	179
1965	185.2
1966	183.7
1967	198.3
1968	210.6
1969	198.9
1970	193.6
1971	195.7
1972	195.2
1973	199.4
1974	222.4
1975	225.7
1976	212.8
1977	232.4
1978	221.9
1979	214.4
1980	238.3
1981	244
1982	223.4
1983	201.8
1984	197
1985	191.7
1986	190.2
1987	206.5
1988	233.1
1989	239.3
1990	216.5
1991	216.4
1992	206.4
1993	192
1994	201.5
1995	172.9
1996	195.3
1997	181.9
1998	184.5
1999	200.2
2000	246