Year	Kilotonnes
1850	0.09802
1851	0.06539
1852	0.1308
1853	0.1962
1854	0.2615
1855	0.3269
1856	0.3923
1857	0.4577
1858	0.5231
1859	0.5885
1860	0.6539
1861	0.7192
1862	0.7846
1863	0.85
1864	0.9154
1865	0.9808
1866	1.046
1867	1.112
1868	1.177
1869	1.242
1870	1.308
1871	1.373
1872	1.438
1873	1.596
1874	1.753
1875	1.91
1876	2.067
1877	2.224
1878	2.382
1879	2.539
1880	2.696
1881	2.854
1882	3.012
1883	3.169
1884	4.412
1885	4.889
1886	5.508
1887	5.841
1888	9.242
1889	10.2
1890	9.427
1891	12.63
1892	19.06
1893	22.63
1894	24.71
1895	26.07
1896	24.13
1897	27.14
1898	32.06
1899	37.8
1900	38.09
1901	58.64
1902	63.11
1903	74.36
1904	80.79
1905	97.47
1906	92.06
1907	90.64
1908	85.69
1909	103
1910	97.02
1911	142.7
1912	124
1913	81.3
1914	51.12
1915	75.78
1916	97.33
1917	111.5
1918	151.5
1919	123.4
1920	127.1
1921	89.12
1922	54.76
1923	118.2
1924	108.6
1925	155.9
1926	184.8
1927	199.7
1928	206.5
1929	216.2
1930	178
1931	145.7
1932	103.2
1933	115.8
1934	161
1935	150.6
1936	145.3
1937	187.6
1938	224.3
1939	208.9
1940	207.9
1941	203.5
1942	216.3
1943	249
1944	223.3
1945	252.6
1946	252
1947	278.1
1948	277.2
1949	257.4
1950	327
1951	351.1
1952	329.3
1953	334.7
1954	351
1955	359.2
1956	346.7
1957	337.3
1958	342.8
1959	340.5
1960	336.7
1961	320
1962	314.3
1963	327.9
1964	314.5
1965	326.9
1966	335.3
1967	358
1968	376.7
1969	383.4
1970	394.5
1971	379.1
1972	398.3
1973	425.7
1974	516.5
1975	544.6
1976	578.4
1977	665.2
1978	698.9
1979	774.6
1980	990.8
1981	1078
1982	1019
1983	880.3
1984	967.5
1985	975.9
1986	975.4
1987	1065
1988	1060
1989	1132
1990	1159
1991	1126
1992	1115
1993	1090
1994	1248
1995	1096
1996	1152
1997	1261
1998	1398
1999	1313
2000	1378