Year	Tonnes
1830	3.667
1831	3.667
1832	3.667
1833	3.667
1834	3.667
1835	3.667
1836	22.002
1837	36.67
1838	25.669
1839	47.671
1840	36.67
1841	102.676
1842	143.013
1843	172.349
1844	201.685
1845	275.025
1846	282.359
1847	260.357
1848	293.36
1849	326.363
1850	495.045
1851	509.713
1852	535.382
1853	652.726
1854	550.05
1855	553.717
1856	755.402
1857	850.744
1858	1151.438
1859	1631.815
1860	1932.509
1861	2005.849
1862	2189.199
1863	2434.888
1864	2335.879
1865	2306.543
1866	2291.875
1867	2559.566
1868	2662.242
1869	2640.24
1870	3076.613
1871	2940.934
1872	3263.63
1873	3138.952
1874	3120.617
1875	3292.966
1876	3571.658
1877	3784.344
1878	3758.675
1879	3975.028
1880	4418.735
1881	4935.782
1882	5386.823
1883	5907.537
1884	5874.534
1885	5764.524
1886	6098.221
1887	6145.892
1888	6439.252
1889	6827.954
1890	7345.001
1891	7946.389
1892	8305.755
1893	8126.072
1894	8742.128
1895	8610.116
1896	9310.513
1897	9552.535
1898	9380.186
1899	10634.3
1900	11228.354
1901	11815.074
1902	12346.789
1903	12185.441
1904	13003.182
1905	13582.568
1906	13872.261
1907	14106.949
1908	14796.345
1909	15177.713
1910	14906.355
1911	14741.34
1912	15995.454
1913	17432.918
1914	17315.574
1915	15324.393
1916	17880.292
1917	15863.442
1918	16747.189
1919	15940.449
1920	14066.612
1921	14858.684
1922	14954.026
1923	17227.566
1924	18404.673
1925	19068.4
1926	18393.672
1927	21462.951
1928	21532.624
1929	23996.848
1930	23663.151
1931	22555.717
1932	21198.927
1933	18727.369
1934	20267.509
1935	22478.71
1936	8063.733
1937	5251.144
1938	13234.203
1939	15731.43
1940	21642.634
1941	21532.624
1942	23083.765
1943	23875.837
1944	25819.347
1945	28298.239
1946	28118.556
1947	31206.17
1948	32749.977
1949	35793.587
1950	33072.673
1951	33153.347
1952	37645.422
1953	38976.543
1954	39772.282
1955	40322.332
1956	42386.853
1957	50274.57
1958	55940.085
1959	52144.74
1960	48928.781
1961	53677.546
1962	60054.459
1963	58822.347
1964	64410.855
1965	71117.798
1966	77729.399
1967	86519.198
1968	97157.165
1969	96882.14
1970	116929.629
1971	128682.364
1972	145026.183
1973	155367.123
1974	173152.073
1975	181644.845
1976	198443.372
1977	195663.786
1978	200493.225
1979	203745.854
1980	215003.544
1981	207288.176
1982	209906.414
1983	204867.956
1984	198953.085
1985	201233.959
1986	190467.647
1987	190878.351
1988	199033.759
1989	226671.938
1990	218597.204
1991	225634.177
1992	233921.597
1993	219253.597
1994	233404.55
1995	241611.296
1996	233305.541
1997	252073.247
1998	261541.441
1999	282355.333
2000	294434.431
2001	297830.073
2002	314518.59
2003	321097.188
2004	339428.521
2005	353462.13
2006	350037.152
2007	358236.564
2008	329285.599
2009	288237.201
2010	270910.626
2011	270547.593
2012	264779.402
2013	237034.88
2014	233976.602