Year	Kilotonnes
1850	0.00882
1851	0.00989
1852	0.01267
1853	0.02535
1854	0.03805
1855	0.05076
1856	0.0635
1857	0.07625
1858	0.08901
1859	0.1018
1860	0.1146
1861	0.1274
1862	0.1402
1863	0.1531
1864	0.166
1865	0.1788
1866	0.1917
1867	0.2047
1868	0.2176
1869	0.2305
1870	0.2435
1871	0.2565
1872	0.2695
1873	0.2825
1874	0.2955
1875	0.3086
1876	0.3216
1877	0.3347
1878	0.3478
1879	0.3609
1880	0.3741
1881	0.3872
1882	0.4004
1883	0.4136
1884	0.4268
1885	0.44
1886	0.4532
1887	0.4665
1888	0.4797
1889	0.493
1890	0.5063
1891	0.5196
1892	0.533
1893	0.5463
1894	0.5597
1895	0.5295
1896	0.3923
1897	0.5289
1898	0.5508
1899	0.5728
1900	0.7078
1901	0.8797
1902	0.9959
1903	0.9113
1904	0.9402
1905	1.089
1906	1.088
1907	1.622
1908	1.616
1909	1.762
1910	1.779
1911	1.708
1912	1.909
1913	2.034
1914	3.28
1915	4.526
1916	5.772
1917	7.018
1918	8.264
1919	9.51
1920	10.76
1921	12
1922	16.17
1923	9.719
1924	11.73
1925	13.12
1926	14.5
1927	15.7
1928	19.11
1929	22.22
1930	26.21
1931	28.34
1932	27.29
1933	25.46
1934	28.58
1935	31.93
1936	33.67
1937	32.5
1938	37.77
1939	41.02
1940	42.53
1941	45.34
1942	34.86
1943	30.14
1944	25.76
1945	21.67
1946	15.84
1947	32.74
1948	47.11
1949	57.39
1950	67.61
1951	75.01
1952	66.54
1953	64.85
1954	60.04
1955	67.34
1956	71.84
1957	81.28
1958	85.93
1959	88.32
1960	96.96
1961	103.4
1962	109.8
1963	114.9
1964	128.9
1965	140.4
1966	138.4
1967	142.7
1968	133.9
1969	140.7
1970	145.4
1971	161.2
1972	173.7
1973	171.1
1974	184.5
1975	189.3
1976	200.2
1977	202.3
1978	199.9
1979	205.3
1980	214.5
1981	220.7
1982	221.6
1983	238
1984	237.4
1985	243.1
1986	241.8
1987	240.2
1988	243.7
1989	245.4
1990	240
1991	156.1
1992	107.7
1993	90.7
1994	71.49
1995	55
1996	71.87
1997	93.91
1998	122.7
1999	160.3
2000	209.5