Year	Kilotonnes
1850	0.00982
1851	0.00982
1852	0.01966
1853	0.02949
1854	0.03934
1855	0.04919
1856	0.05905
1857	0.06892
1858	0.07879
1859	0.08868
1860	0.09857
1861	0.1959
1862	0.2933
1863	0.3907
1864	0.4881
1865	0.5855
1866	0.6829
1867	0.7803
1868	0.8777
1869	0.9751
1870	1.073
1871	1.17
1872	1.271
1873	1.373
1874	1.474
1875	1.576
1876	1.677
1877	1.779
1878	1.88
1879	1.982
1880	2.083
1881	2.359
1882	2.199
1883	2.214
1884	2.228
1885	2.452
1886	2.675
1887	2.899
1888	3.132
1889	3.482
1890	3.681
1891	3.101
1892	4.001
1893	3.495
1894	4.344
1895	3.835
1896	4.313
1897	4.861
1898	5.026
1899	5.07
1900	6.057
1901	6.598
1902	3.478
1903	3.808
1904	4.522
1905	4.912
1906	4.802
1907	5.2
1908	6.819
1909	6.25
1910	7.457
1911	6.48
1912	7.424
1913	8.485
1914	9.171
1915	10.49
1916	11.53
1917	9.905
1918	10.63
1919	11.63
1920	12.21
1921	16.75
1922	17.26
1923	21.15
1924	22.32
1925	22.11
1926	21.72
1927	23.75
1928	24.64
1929	27.71
1930	30.17
1931	24.87
1932	20.74
1933	25.02
1934	30.2
1935	32.37
1936	33.57
1937	42.77
1938	41.1
1939	43.78
1940	40.7
1941	41.97
1942	42.79
1943	42.92
1944	41.7
1945	41.35
1946	40.06
1947	42.33
1948	49.26
1949	50.99
1950	53.29
1951	30.59
1952	32.29
1953	31.46
1954	29.68
1955	11.67
1956	25.31
1957	22.08
1958	23.06
1959	16.21
1960	3.445
1961	6.807
1962	3.436
1963	2.386
1964	2.346
1965	2.322
1966	3.431
1967	1.107
1968	1.115
1969	1.086
1970	1.07
1971	1.035
1972	1.101
1973	1.137
1974	1.268
1975	1.307
1976	1.617
1977	1.723
1978	1.776
1979	1.827
1980	1.746
1981	1.839
1982	1.969
1983	2.02
1984	2.062
1985	2.192
1986	2.348
1987	2.511
1988	2.667
1989	2.786
1990	2.907
1991	3.081
1992	3.289
1993	3.508
1994	3.738
1995	3.934
1996	4.187
1997	4.464
1998	4.755
1999	5.042
2000	5.307