Year	Kilotonnes
1850	0.01452
1851	0.00969
1852	0.01822
1853	0.0164
1854	0.02034
1855	0.01967
1856	0.02706
1857	0.03099
1858	0.03262
1859	0.0308
1860	0.04394
1861	0.04327
1862	0.04834
1863	0.04306
1864	0.05503
1865	0.05435
1866	0.04561
1867	0.05758
1868	0.05575
1869	0.06771
1870	0.06012
1871	0.05483
1872	0.06679
1873	0.05928
1874	0.06673
1875	0.06727
1876	0.07236
1877	0.06365
1878	0.06874
1879	0.06693
1880	0.06054
1881	0.06121
1882	0.06738
1883	0.05017
1884	0.06657
1885	0.06152
1886	0.05739
1887	0.04874
1888	0.05949
1889	0.04761
1890	0.05206
1891	0.04852
1892	0.0553
1893	0.06149
1894	0.06403
1895	0.06476
1896	0.06564
1897	0.06607
1898	0.07979
1899	0.0872
1900	0.09506
1901	0.1244
1902	0.128
1903	0.1459
1904	0.1533
1905	0.1711
1906	0.1702
1907	0.1847
1908	0.2033
1909	0.2212
1910	0.2261
1911	0.268
1912	0.2667
1913	0.2397
1914	0.2374
1915	0.2932
1916	0.3549
1917	0.4279
1918	0.4763
1919	0.3999
1920	0.4307
1921	0.3569
1922	0.4227
1923	0.5419
1924	0.5394
1925	0.5856
1926	0.6355
1927	0.698
1928	0.836
1929	0.8965
1930	0.7817
1931	0.7014
1932	0.4818
1933	0.5809
1934	0.7506
1935	0.7856
1936	0.8019
1937	1.089
1938	1.071
1939	1.057
1940	1.103
1941	1.256
1942	1.169
1943	1.29
1944	1.349
1945	1.419
1946	1.606
1947	1.5
1948	1.557
1949	1.611
1950	2.055
1951	3.699
1952	1.506
1953	2.405
1954	1.661
1955	2.499
1956	0.7969
1957	0.1636
1958	11.52
1959	22.87
1960	34.23
1961	45.58
1962	56.94
1963	68.29
1964	79.64
1965	93.5
1966	98.41
1967	79.22
1968	84.93
1969	101.1
1970	108.9
1971	95.65
1972	114.6
1973	111.3
1974	105.8
1975	96.63
1976	76.37
1977	66.23
1978	62.57
1979	73.85
1980	65.63
1981	67.8
1982	53.96
1983	56.85
1984	31.91
1985	44.28
1986	50.09
1987	31.44
1988	35.18
1989	49.78
1990	44.4
1991	35.53
1992	54.5
1993	40.09
1994	49.5
1995	50.55
1996	48.15
1997	47.29
1998	45.38
1999	31.92
2000	60.47