Year	Kilotonnes
1850	0.07195
1851	0.048
1852	0.096
1853	0.144
1854	0.192
1855	0.24
1856	0.288
1857	0.336
1858	0.384
1859	0.432
1860	0.48
1861	0.528
1862	0.576
1863	0.624
1864	0.672
1865	0.72
1866	0.768
1867	0.816
1868	0.864
1869	0.912
1870	0.96
1871	1.008
1872	1.056
1873	1.104
1874	1.152
1875	1.2
1876	1.2
1877	1.2
1878	1.2
1879	1.2
1880	1.2
1881	1.231
1882	1.261
1883	1.292
1884	1.331
1885	1.362
1886	1.393
1887	1.433
1888	1.463
1889	1.494
1890	1.543
1891	1.673
1892	1.767
1893	1.734
1894	1.747
1895	1.778
1896	1.809
1897	1.84
1898	4.334
1899	6.828
1900	10.56
1901	12.92
1902	11.7
1903	12.9
1904	13
1905	15.71
1906	17.03
1907	28.12
1908	28.6
1909	28.69
1910	37.04
1911	38.44
1912	36.32
1913	37.75
1914	36.81
1915	46.56
1916	55.9
1917	59.28
1918	58.17
1919	51.64
1920	45.93
1921	45.19
1922	47.86
1923	56.4
1924	48.61
1925	48.33
1926	54.27
1927	60.28
1928	68.32
1929	70.09
1930	62.24
1931	55.32
1932	27.07
1933	29.81
1934	34.61
1935	40.1
1936	44.4
1937	50.74
1938	55.36
1939	52.49
1940	60.1
1941	52.11
1942	49.5
1943	49.29
1944	51.53
1945	52.91
1946	43.61
1947	43.7
1948	38.86
1949	51.54
1950	60.63
1951	66.15
1952	68.77
1953	74.25
1954	79.78
1955	83.93
1956	90.48
1957	95.97
1958	94.54
1959	88.57
1960	222.5
1961	233.9
1962	193.9
1963	169.7
1964	194.1
1965	210.3
1966	210.3
1967	209.6
1968	222.9
1969	221.4
1970	228.7
1971	227.6
1972	241.9
1973	235.7
1974	236.8
1975	203.7
1976	230
1977	313.1
1978	317.7
1979	338.9
1980	319.7
1981	305.6
1982	309.8
1983	293.8
1984	325.3
1985	338.8
1986	320.9
1987	336.7
1988	273.9
1989	312.8
1990	279.6
1991	316.3
1992	332.9
1993	358.6
1994	367.6
1995	361.5
1996	360.8
1997	415.2
1998	455.9
1999	445.9
2000	473.2