Year	Kilotonnes
1850	0
1851	0.00028
1852	0.00056
1853	0.00085
1854	0.00113
1855	0.00141
1856	0.00169
1857	0.00197
1858	0.00226
1859	0.00254
1860	0.00282
1861	0.00311
1862	0.00339
1863	0.00367
1864	0.00396
1865	0.00424
1866	0.00453
1867	0.00481
1868	0.0051
1869	0.00538
1870	0.00567
1871	0.00595
1872	0.00624
1873	0.00653
1874	0.00681
1875	0.0071
1876	0.00739
1877	0.00767
1878	0.00796
1879	0.00825
1880	0.00853
1881	0.01315
1882	0.01778
1883	0.0224
1884	0.02703
1885	0.03167
1886	0.03631
1887	0.04095
1888	0.0456
1889	0.05026
1890	0.05492
1891	0.05746
1892	0.05938
1893	0.06058
1894	0.06095
1895	0.06038
1896	0.08617
1897	0.1118
1898	0.1371
1899	0.1647
1900	0.1914
1901	0.2296
1902	0.4592
1903	0.6888
1904	0.9184
1905	1.148
1906	1.378
1907	1.607
1908	1.837
1909	2.066
1910	2.296
1911	2.526
1912	2.755
1913	2.985
1914	3.214
1915	3.444
1916	3.674
1917	3.903
1918	4.133
1919	4.362
1920	4.592
1921	4.822
1922	5.051
1923	5.281
1924	5.51
1925	5.74
1926	5.97
1927	6.199
1928	6.429
1929	6.658
1930	6.888
1931	7.118
1932	7.347
1933	7.577
1934	7.806
1935	8.036
1936	8.266
1937	8.495
1938	8.725
1939	8.954
1940	9.184
1941	9.405
1942	9.625
1943	9.827
1944	10.01
1945	10.19
1946	10.22
1947	10.34
1948	10.46
1949	10.52
1950	0.2574
1951	0.3475
1952	0.3396
1953	0.5317
1954	1.353
1955	4.143
1956	2.037
1957	1.844
1958	2.068
1959	1.699
1960	1.794
1961	3.704
1962	1.557
1963	2.5
1964	1.509
1965	0.5173
1966	3.156
1967	4.242
1968	6.174
1969	13.75
1970	2.167
1971	4.598
1972	8.291
1973	0.1423
1974	10.97
1975	17.23
1976	28.26
1977	44.59
1978	44.44
1979	43.73
1980	51.4
1981	56.32
1982	49.44
1983	50.21
1984	17.02
1985	39.35
1986	10.74
1987	50.62
1988	50.61
1989	76.09
1990	108.5
1991	110.9
1992	113.3
1993	115.9
1994	118.4
1995	121.1
1996	123.8
1997	126.5
1998	129.4
1999	132.2
2000	135.2