Year	Kilotonnes
1850	0.00035
1851	0.00035
1852	0.00071
1853	0.00106
1854	0.00142
1855	0.00178
1856	0.00213
1857	0.00249
1858	0.00285
1859	0.0032
1860	0.00356
1861	0.00708
1862	0.0106
1863	0.01411
1864	0.01763
1865	0.02115
1866	0.02467
1867	0.02819
1868	0.03171
1869	0.03523
1870	0.03875
1871	0.04227
1872	0.04593
1873	0.0496
1874	0.05326
1875	0.05693
1876	0.06059
1877	0.06426
1878	0.06793
1879	0.07159
1880	0.07526
1881	0.08523
1882	0.07945
1883	0.07997
1884	0.08049
1885	0.08857
1886	0.09665
1887	0.1047
1888	0.1132
1889	0.1258
1890	0.133
1891	0.112
1892	0.1445
1893	0.1263
1894	0.1569
1895	0.1386
1896	0.1558
1897	0.1756
1898	0.1816
1899	0.1832
1900	0.2188
1901	0.2383
1902	0.1256
1903	0.1376
1904	0.1634
1905	0.1774
1906	0.1735
1907	0.1879
1908	0.2463
1909	0.2258
1910	0.2694
1911	0.2341
1912	0.2682
1913	0.3065
1914	0.3313
1915	0.3788
1916	0.4166
1917	0.3578
1918	0.3841
1919	0.4203
1920	0.441
1921	0.605
1922	0.6236
1923	0.764
1924	0.8062
1925	0.7989
1926	0.7845
1927	0.8578
1928	0.89
1929	1.001
1930	1.09
1931	0.8985
1932	0.7491
1933	0.9041
1934	1.091
1935	1.169
1936	1.213
1937	1.545
1938	1.485
1939	1.582
1940	1.47
1941	1.516
1942	1.546
1943	1.551
1944	1.506
1945	1.494
1946	1.447
1947	1.529
1948	1.779
1949	1.842
1950	1.925
1951	1.918
1952	2.112
1953	2.209
1954	2.269
1955	2.396
1956	2.643
1957	2.704
1958	2.763
1959	2.878
1960	2.67
1961	2.801
1962	2.913
1963	2.82
1964	3.21
1965	3.501
1966	3.484
1967	3.388
1968	3.65
1969	3.557
1970	3.743
1971	3.879
1972	3.946
1973	4.278
1974	4.553
1975	4.12
1976	4.038
1977	4.344
1978	4.323
1979	4.505
1980	4.694
1981	4.794
1982	4.678
1983	4.612
1984	4.651
1985	4.669
1986	4.669
1987	4.778
1988	4.757
1989	4.778
1990	4.641
1991	4.685
1992	4.73
1993	4.775
1994	4.821
1995	4.867
1996	4.913
1997	4.96
1998	5.008
1999	5.056
2000	5.104