Year	Kilotonnes
1850	0.3907
1851	0.2606
1852	0.4903
1853	0.4413
1854	0.5472
1855	0.5292
1856	0.7279
1857	0.8338
1858	0.8777
1859	0.8288
1860	1.182
1861	1.164
1862	1.301
1863	1.158
1864	1.481
1865	1.462
1866	1.227
1867	1.549
1868	1.5
1869	1.822
1870	1.618
1871	1.475
1872	1.797
1873	1.595
1874	1.795
1875	1.81
1876	1.947
1877	1.712
1878	1.849
1879	1.801
1880	1.629
1881	1.647
1882	1.813
1883	1.35
1884	1.791
1885	1.655
1886	1.544
1887	1.311
1888	1.6
1889	1.281
1890	1.401
1891	1.305
1892	1.488
1893	1.654
1894	1.723
1895	1.742
1896	1.766
1897	1.778
1898	2.147
1899	2.346
1900	2.557
1901	3.346
1902	3.444
1903	3.926
1904	4.123
1905	4.603
1906	4.58
1907	4.968
1908	5.471
1909	5.951
1910	6.083
1911	7.21
1912	7.176
1913	6.449
1914	6.388
1915	7.888
1916	9.547
1917	11.51
1918	12.81
1919	10.76
1920	11.59
1921	9.601
1922	11.37
1923	14.58
1924	14.51
1925	15.76
1926	17.1
1927	18.78
1928	22.49
1929	24.12
1930	21.03
1931	18.87
1932	12.96
1933	15.63
1934	20.19
1935	21.14
1936	21.57
1937	29.31
1938	28.82
1939	28.43
1940	29.66
1941	33.8
1942	31.44
1943	34.7
1944	36.29
1945	38.19
1946	43.2
1947	40.35
1948	41.9
1949	43.33
1950	55.28
1951	60.97
1952	60.01
1953	73.33
1954	75.94
1955	71.11
1956	61.05
1957	58.87
1958	57.11
1959	51.82
1960	55.62
1961	51.57
1962	48.38
1963	49.25
1964	48.12
1965	51.56
1966	50.14
1967	46.48
1968	40.18
1969	42.74
1970	45.87
1971	43.91
1972	37.94
1973	42.01
1974	46.78
1975	48.25
1976	42.09
1977	46.9
1978	49.81
1979	39.64
1980	49.72
1981	43.76
1982	38.74
1983	24.34
1984	24.86
1985	20.35
1986	25.58
1987	22.64
1988	22.37
1989	21.01
1990	21
1991	34.98
1992	53.58
1993	33.99
1994	16.5
1995	79.61
1996	60.96
1997	33.72
1998	27
1999	14.65
2000	12.01