Year	Kilotonnes
1850	0
1851	0.4541
1852	0.9083
1853	1.362
1854	1.817
1855	2.271
1856	2.725
1857	3.179
1858	3.633
1859	4.087
1860	4.541
1861	4.973
1862	5.4
1863	5.822
1864	6.241
1865	6.656
1866	7.066
1867	7.472
1868	7.874
1869	8.272
1870	8.666
1871	10.06
1872	11.45
1873	12.83
1874	14.22
1875	15.6
1876	16.97
1877	18.35
1878	19.72
1879	21.08
1880	22.51
1881	23.67
1882	24.81
1883	25.93
1884	27.04
1885	28.13
1886	29.2
1887	30.26
1888	31.3
1889	32.33
1890	33.34
1891	34.83
1892	36.74
1893	36.93
1894	39.3
1895	45.9
1896	48.83
1897	50.62
1898	55.54
1899	59.98
1900	69.91
1901	74.48
1902	82.06
1903	82.48
1904	90.07
1905	92.23
1906	105.2
1907	118.2
1908	133.7
1909	125.6
1910	128.6
1911	136.3
1912	164.8
1913	177.8
1914	179
1915	183.9
1916	184.2
1917	192
1918	214.4
1919	277.6
1920	186.2
1921	199.1
1922	196.5
1923	202.8
1924	217.3
1925	217.2
1926	221.7
1927	237.4
1928	241.2
1929	245.2
1930	252.3
1931	228.5
1932	212.9
1933	212.2
1934	234.8
1935	246.4
1936	240.4
1937	261.3
1938	290.6
1939	286.3
1940	300.8
1941	299.4
1942	298.1
1943	259.9
1944	264.7
1945	292.5
1946	298.7
1947	301.5
1948	314.9
1949	329.6
1950	316.7
1951	328.1
1952	346.1
1953	347.7
1954	367
1955	417.9
1956	433.2
1957	479.3
1958	499
1959	521.1
1960	574
1961	610.2
1962	661
1963	718.9
1964	684.7
1965	736.7
1966	755.5
1967	773.4
1968	818
1969	815.7
1970	846.5
1971	834.3
1972	864.6
1973	895.8
1974	970.7
1975	1084
1976	1139
1977	1147
1978	1157
1979	1190
1980	1268
1981	1409
1982	1481
1983	1532
1984	1634
1985	1701
1986	1805
1987	1915
1988	2043
1989	2128
1990	2219
1991	2342
1992	2432
1993	2520
1994	2645
1995	2805
1996	3053
1997	3138
1998	2927
1999	2775
2000	2731