Year	Kilotonnes
1850	3.949
1851	5.193
1852	6.399
1853	7.491
1854	7.48
1855	8.478
1856	9.986
1857	11.55
1858	12.56
1859	13.67
1860	15.42
1861	17.46
1862	19.56
1863	19.77
1864	19.83
1865	21.99
1866	19.79
1867	24.8
1868	29.35
1869	32.19
1870	36.26
1871	44.97
1872	47.34
1873	51.96
1874	51.37
1875	50.97
1876	52.98
1877	53.14
1878	54.82
1879	61.45
1880	63.81
1881	68.5
1882	70.6
1883	75.95
1884	77.1
1885	80.42
1886	81.69
1887	86.39
1888	90.13
1889	95.37
1890	100.1
1891	106.4
1892	105.9
1893	114.6
1894	118.2
1895	126.3
1896	131.4
1897	138.7
1898	144.1
1899	147.6
1900	156.5
1901	160.9
1902	157.1
1903	160
1904	166
1905	171.8
1906	189.9
1907	221.4
1908	277.5
1909	233.3
1910	279.7
1911	273.8
1912	315.8
1913	142.1
1914	121.7
1915	181.8
1916	140.2
1917	113.9
1918	88.5
1919	67.25
1920	50.7
1921	61.84
1922	61.5
1923	61.19
1924	69.39
1925	66
1926	62.78
1927	70.08
1928	74.02
1929	85.61
1930	69.06
1931	65.31
1932	56.81
1933	55.47
1934	54.01
1935	55.51
1936	57.64
1937	69.47
1938	73.32
1939	84.32
1940	93.1
1941	74.49
1942	61.05
1943	50.88
1944	40.95
1945	23.6
1946	30.41
1947	51.52
1948	77.03
1949	94.25
1950	89.6
1951	107.3
1952	104.7
1953	105.9
1954	122.1
1955	143.8
1956	155.8
1957	165.4
1958	145.2
1959	137.5
1960	146
1961	143.6
1962	157.2
1963	183.2
1964	187
1965	185.3
1966	185.6
1967	180
1968	186.6
1969	182.8
1970	207.6
1971	196.4
1972	199.8
1973	196.9
1974	196.1
1975	174.4
1976	173.3
1977	167
1978	170.4
1979	185.3
1980	171.8
1981	151.8
1982	144.3
1983	108.5
1984	100.4
1985	91.42
1986	81.49
1987	70.59
1988	52.72
1989	47.15
1990	40
1991	38.5
1992	30.5
1993	29.5
1994	26.5
1995	26
1996	24.5
1997	22.5
1998	20.5
1999	19
2000	17.5