Year	Kilotonnes
1850	0.1194
1851	0.1194
1852	0.239
1853	0.3586
1854	0.4783
1855	0.598
1856	0.7179
1857	0.8379
1858	0.9579
1859	1.078
1860	1.198
1861	2.382
1862	3.566
1863	4.75
1864	5.934
1865	7.118
1866	8.302
1867	9.486
1868	10.67
1869	11.85
1870	13.04
1871	14.22
1872	15.46
1873	16.69
1874	17.92
1875	19.16
1876	20.39
1877	21.63
1878	22.86
1879	24.09
1880	25.33
1881	28.68
1882	26.74
1883	26.91
1884	27.09
1885	29.81
1886	32.52
1887	35.24
1888	38.08
1889	42.33
1890	44.75
1891	37.7
1892	48.64
1893	42.49
1894	52.82
1895	46.63
1896	52.44
1897	59.09
1898	61.1
1899	61.63
1900	73.64
1901	80.21
1902	42.28
1903	46.29
1904	54.97
1905	59.71
1906	58.37
1907	63.22
1908	94.78
1909	78.95
1910	110.5
1911	63.09
1912	63.06
1913	63.03
1914	63
1915	62.97
1916	62.93
1917	62.9
1918	62.87
1919	62.84
1920	76.55
1921	134.7
1922	114.5
1923	177.6
1924	159.3
1925	152.7
1926	168.9
1927	203.7
1928	215.7
1929	242.4
1930	276.2
1931	143.7
1932	38.47
1933	69.2
1934	99.56
1935	129.5
1936	159.2
1937	188.4
1938	159
1939	165
1940	19.19
1941	29.36
1942	39.31
1943	49.04
1944	58.57
1945	67.87
1946	76.97
1947	85.85
1948	172.8
1949	204.1
1950	206.8
1951	216.2
1952	272.8
1953	255.4
1954	294.5
1955	388.7
1956	466.1
1957	469.5
1958	455.5
1959	465.8
1960	338.2
1961	393.1
1962	493.2
1963	399.5
1964	523.8
1965	575.1
1966	544.6
1967	482.4
1968	451.7
1969	438.5
1970	389
1971	408
1972	416.5
1973	452.4
1974	506.2
1975	459.7
1976	451.6
1977	507.8
1978	498.7
1979	524.5
1980	403.8
1981	430.6
1982	419.5
1983	380
1984	385.8
1985	366
1986	384.2
1987	397.1
1988	394.1
1989	401.2
1990	370.3
1991	283.5
1992	182.7
1993	132.8
1994	72.96
1995	48.74
1996	11.81
1997	2.762
1998	1.491
1999	0.7601
2000	0.5322