Year	Kilotonnes
1850	0.4954
1851	0.6207
1852	0.7031
1853	0.8212
1854	1.027
1855	1.207
1856	1.711
1857	2.153
1858	1.973
1859	2.505
1860	2.569
1861	3.169
1862	3.305
1863	3.371
1864	3.563
1865	3.72
1866	3.857
1867	3.759
1868	4.248
1869	3.963
1870	4.724
1871	5.009
1872	5.712
1873	5.775
1874	6.204
1875	7.194
1876	7.63
1877	8.009
1878	7.036
1879	7.12
1880	8.701
1881	8.548
1882	9.608
1883	9.846
1884	10.78
1885	11.6
1886	11.57
1887	11.96
1888	13.45
1889	15.61
1890	15.95
1891	17.15
1892	17.48
1893	17.78
1894	20.44
1895	20.78
1896	21.4
1897	23.7
1898	24.96
1899	31.6
1900	31.9
1901	30.16
1902	31.68
1903	35.38
1904	38.16
1905	38.19
1906	43.58
1907	50.73
1908	54.64
1909	51.14
1910	53.17
1911	51.9
1912	57.71
1913	65.74
1914	62.23
1915	63.32
1916	69.26
1917	30.12
1918	36.23
1919	36.12
1920	52.69
1921	30.07
1922	52.37
1923	67.44
1924	82.6
1925	76.37
1926	69.64
1927	101.5
1928	91.46
1929	115
1930	114.1
1931	111
1932	112.6
1933	119.4
1934	127.1
1935	131.5
1936	141.7
1937	157.1
1938	140.3
1939	167.2
1940	108.3
1941	110.1
1942	118.6
1943	162.9
1944	153.2
1945	73.47
1946	228.4
1947	321.6
1948	368.1
1949	310.3
1950	205.4
1951	256.3
1952	259.5
1953	240.9
1954	249.5
1955	295.3
1956	290.7
1957	330.1
1958	296.6
1959	324.7
1960	367.4
1961	370.8
1962	383.6
1963	396.7
1964	444.6
1965	432.6
1966	397
1967	428.2
1968	477.7
1969	471.7
1970	465
1971	423.2
1972	364
1973	337.7
1974	357.4
1975	345
1976	337.5
1977	302.2
1978	269.3
1979	250.5
1980	245.5
1981	215.5
1982	185.5
1983	152.5
1984	148
1985	133
1986	136
1987	114
1988	112
1989	80
1990	53
1991	49.5
1992	46.5
1993	43.5
1994	43.5
1995	38.5
1996	40.5
1997	38
1998	36.5
1999	29.5
2000	27.5