Year	Kilotonnes
1850	5.71
1851	4.579
1852	5.732
1853	2.317
1854	1.185
1855	1.196
1856	4.633
1857	4.644
1858	4.655
1859	4.666
1860	5.818
1861	5.829
1862	6.981
1863	8.133
1864	10.43
1865	9.296
1866	13.88
1867	18.46
1868	19.61
1869	19.63
1870	10.51
1871	12.81
1872	13.97
1873	13.99
1874	12.87
1875	12.88
1876	12.88
1877	14.02
1878	10.6
1879	10.59
1880	10.59
1881	21
1882	23.67
1883	28.22
1884	34.06
1885	30.28
1886	26.75
1887	25.5
1888	29.71
1889	34.82
1890	34.76
1891	42.23
1892	38.36
1893	41.56
1894	44.73
1895	48.22
1896	53.01
1897	62.2
1898	69.61
1899	80.73
1900	84.3
1901	89.6
1902	83.83
1903	88.41
1904	94.52
1905	106.3
1906	111.4
1907	133.2
1908	134.2
1909	124.8
1910	145.2
1911	154.4
1912	164.6
1913	167.8
1914	148.7
1915	130.7
1916	121
1917	121.4
1918	125.5
1919	81.99
1920	103.8
1921	96.43
1922	105.4
1923	119.6
1924	118.1
1925	118.3
1926	114.5
1927	123.7
1928	117.3
1929	114.5
1930	109.7
1931	94.77
1932	108.4
1933	110.6
1934	112.2
1935	119.6
1936	131.4
1937	146.2
1938	152.2
1939	160.9
1940	158.3
1941	170.5
1942	169.8
1943	160.6
1944	160.7
1945	148.6
1946	152.8
1947	156.3
1948	162.1
1949	164.7
1950	182.1
1951	185.3
1952	198.5
1953	214.7
1954	243.3
1955	285.2
1956	322.1
1957	335.3
1958	359.1
1959	375.5
1960	406.1
1961	396.4
1962	417.5
1963	444.3
1964	432.6
1965	432.9
1966	457.5
1967	468
1968	487.2
1969	497.4
1970	502.6
1971	458
1972	486.3
1973	489.9
1974	525.7
1975	537.3
1976	577.5
1977	609.6
1978	591.6
1979	609.2
1980	574.8
1981	622.2
1982	690.7
1983	670.4
1984	627.1
1985	618.8
1986	646.4
1987	712.8
1988	631.2
1989	766
1990	818
1991	839
1992	889
1993	914.5
1994	950
1995	898
1996	926.5
1997	920.5
1998	914
1999	962.5
2000	1212