Year	Tonnes
1830	113.677
1831	69.673
1832	88.008
1833	66.006
1834	69.673
1835	51.338
1836	84.341
1837	69.673
1838	62.339
1839	139.346
1840	135.679
1841	143.013
1842	84.341
1843	88.008
1844	187.017
1845	88.008
1846	62.339
1847	165.015
1848	0
1849	0
1850	0
1851	275.025
1852	344.698
1853	344.698
1854	436.373
1855	454.708
1856	476.71
1857	546.383
1858	381.368
1859	770.07
1860	905.749
1861	960.754
1862	1158.772
1863	1210.11
1864	1210.11
1865	1257.781
1866	1430.13
1867	1690.487
1868	1807.831
1869	1965.512
1870	2123.193
1871	2632.906
1872	2797.921
1873	2918.932
1874	2559.566
1875	2636.573
1876	2764.918
1877	2889.596
1878	2878.595
1879	2871.261
1880	3314.968
1881	3553.323
1882	3586.326
1883	4081.371
1884	4334.394
1885	4382.065
1886	4099.706
1887	4088.705
1888	4433.403
1889	4756.099
1890	5258.478
1891	5526.169
1892	5757.19
1893	5999.212
1894	6439.252
1895	6868.291
1896	7381.671
1897	7469.679
1898	8540.443
1899	8280.086
1900	9592.872
1901	9625.875
1902	8855.805
1903	9182.168
1904	9284.844
1905	9438.858
1906	10172.258
1907	10212.595
1908	10780.98
1909	11862.745
1910	11686.729
1911	12005.758
1912	12313.786
1913	13036.185
1914	11602.388
1915	11774.737
1916	11844.41
1917	11727.066
1918	10659.969
1919	4759.766
1920	5592.175
1921	9244.507
1922	11019.335
1923	11870.079
1924	11272.358
1925	10139.255
1926	11782.071
1927	13098.524
1928	13762.251
1929	15126.375
1930	12526.472
1931	11199.018
1932	10219.929
1933	10014.577
1934	10582.962
1935	11089.008
1936	11910.416
1937	13633.906
1938	14785.344
1939	14455.314
1940	15837.773
1941	17869.291
1942	18855.714
1943	19226.081
1944	15870.776
1945	8206.746
1946	10806.649
1947	13850.259
1948	16395.157
1949	20428.857
1950	18408.34
1951	22207.352
1952	27234.809
1953	31796.557
1954	34040.761
1955	35738.582
1956	33193.684
1957	38481.498
1958	39280.904
1959	41943.146
1960	45371.791
1961	48976.452
1962	50560.596
1963	56281.116
1964	62401.339
1965	61293.905
1966	61733.945
1967	58829.681
1968	61154.559
1969	62419.674
1970	70003.03
1971	69280.631
1972	69430.978
1973	73068.642
1974	74102.736
1975	75389.853
1976	80013.94
1977	83204.23
1978	88187.683
1979	86229.505
1980	86860.229
1981	86618.207
1982	86871.23
1983	89137.436
1984	90853.592
1985	86104.827
1986	83537.927
1987	84436.342
1988	78264.781
1989	76090.25
1990	69647.331
1991	66585.386
1992	60395.49
1993	61917.295
1994	58884.686
1995	60369.821
1996	62063.975
1997	60886.868
1998	59163.378
1999	58800.345
2000	55826.408
2001	56977.846
2002	56064.763
2003	59053.368
2004	57458.223
2005	58019.274
2006	57388.55
2007	56035.427
2008	54843.652
2009	48510.743
2010	50223.232
2011	47843.349
2012	44583.386
2013	42141.164
2014	42086.159