Year	Kilotonnes
1850	0.09247
1851	0.1003
1852	0.2003
1853	0.2986
1854	0.3953
1855	0.4947
1856	0.6047
1857	0.7133
1858	0.8053
1859	0.9086
1860	1.003
1861	1.109
1862	1.216
1863	1.313
1864	1.407
1865	1.503
1866	1.601
1867	1.714
1868	1.811
1869	1.903
1870	2.029
1871	2.135
1872	2.208
1873	2.298
1874	2.428
1875	2.513
1876	2.636
1877	2.748
1878	2.819
1879	2.916
1880	3.008
1881	3.12
1882	3.25
1883	3.351
1884	3.468
1885	3.578
1886	3.666
1887	3.779
1888	3.889
1889	4.005
1890	4.105
1891	4.215
1892	4.337
1893	4.415
1894	4.587
1895	4.678
1896	4.761
1897	4.869
1898	4.939
1899	5.131
1900	5.277
1901	5.395
1902	5.46
1903	5.581
1904	5.722
1905	5.829
1906	5.985
1907	6.18
1908	6.272
1909	6.35
1910	6.444
1911	6.596
1912	6.686
1913	6.841
1914	6.965
1915	7.19
1916	7.435
1917	7.739
1918	7.87
1919	8.04
1920	8.55
1921	10.55
1922	14.19
1923	19.53
1924	25.75
1925	30.4
1926	23.79
1927	33.38
1928	32.74
1929	34.34
1930	35.62
1931	34.01
1932	33.67
1933	33.87
1934	35.2
1935	34.2
1936	35.88
1937	35.88
1938	34
1939	41.42
1940	38.95
1941	24.02
1942	19.35
1943	19.85
1944	16.45
1945	19.95
1946	26.34
1947	31.96
1948	32.18
1949	29.83
1950	35.62
1951	41.62
1952	38.34
1953	37.24
1954	38.37
1955	44.17
1956	36.06
1957	32.72
1958	31.91
1959	41.04
1960	45.12
1961	51.1
1962	48.65
1963	57.43
1964	60.76
1965	68.88
1966	70.96
1967	88.97
1968	88.07
1969	91.49
1970	94.05
1971	94.52
1972	90.6
1973	92.5
1974	104
1975	95
1976	68.32
1977	92.8
1978	91.78
1979	117
1980	111
1981	96
1982	79
1983	71
1984	71
1985	70
1986	81
1987	87
1988	76
1989	81
1990	91.5
1991	90
1992	85
1993	80.5
1994	87.5
1995	80.5
1996	73.5
1997	83
1998	88
1999	78.5
2000	65.5