Year	Kilotonnes
1850	1.684
1851	1.889
1852	2.418
1853	2.64
1854	3.025
1855	3.483
1856	4.017
1857	4.397
1858	5.045
1859	4.953
1860	5.345
1861	5.636
1862	6.349
1863	7.056
1864	7.736
1865	8.39
1866	8.697
1867	9.529
1868	10.28
1869	11.06
1870	11.88
1871	13.91
1872	14.97
1873	15.81
1874	16.61
1875	16.92
1876	17.91
1877	17.65
1878	19.23
1879	20.42
1880	23.11
1881	24.24
1882	25.48
1883	28.08
1884	28.83
1885	29.92
1886	30.6
1887	30.94
1888	34.1
1889	37.14
1890	38.55
1891	40.65
1892	40.58
1893	43.53
1894	45.51
1895	48.57
1896	51.22
1897	54.78
1898	60.1
1899	64.24
1900	70.32
1901	71.23
1902	69.62
1903	72.81
1904	76.05
1905	77.26
1906	83.3
1907	91.76
1908	95.1
1909	98
1910	97.04
1911	103.8
1912	113.4
1913	123.3
1914	106.7
1915	98.22
1916	104
1917	97.91
1918	87.82
1919	114.5
1920	130.7
1921	135.7
1922	123
1923	115.9
1924	148
1925	138
1926	138.8
1927	150.7
1928	164.4
1929	184.2
1930	161.6
1931	151.2
1932	132.8
1933	123.4
1934	124.3
1935	125.9
1936	133.8
1937	154.3
1938	143.2
1939	173.8
1940	198
1941	198.7
1942	213.2
1943	239
1944	230.2
1945	129.2
1946	163.9
1947	190.7
1948	205.9
1949	233.9
1950	243.7
1951	267.4
1952	285
1953	292.5
1954	314.5
1955	328.7
1956	362.9
1957	383
1958	420.7
1959	400.6
1960	428.5
1961	484.2
1962	527.1
1963	566.9
1964	598.6
1965	591.9
1966	638.7
1967	667.3
1968	749.6
1969	854.2
1970	942.7
1971	992.5
1972	1013
1973	990.4
1974	1020
1975	1078
1976	1101
1977	1140
1978	1152
1979	1159
1980	1128
1981	1170
1982	1194
1983	1169
1984	1152
1985	1138
1986	1088
1987	1082
1988	1033
1989	999
1990	938
1991	888
1992	769
1993	709.5
1994	635
1995	545.5
1996	473
1997	350.5
1998	221.5
1999	134
2000	132