Year	Tonnes
1846	2871.261
1847	3872.352
1848	3652.332
1849	3333.303
1850	3138.952
1851	3120.617
1852	3766.009
1853	4173.046
1854	5951.541
1855	4653.423
1856	4726.763
1857	4220.717
1858	3711.004
1859	3527.654
1860	4800.103
1861	4407.734
1862	5676.516
1863	4088.705
1864	3406.643
1865	3850.35
1866	4220.717
1867	4044.701
1868	4242.719
1869	4374.731
1870	4946.783
1871	4983.453
1872	5335.485
1873	5144.801
1874	4745.098
1875	5423.493
1876	6215.565
1877	6314.574
1878	6692.275
1879	7216.656
1880	7979.392
1881	8034.397
1882	8137.073
1883	9017.153
1884	9024.487
1885	9427.857
1886	9625.875
1887	9794.557
1888	10868.988
1889	10619.632
1890	10293.269
1891	11917.75
1892	11331.03
1893	11470.376
1894	11628.057
1895	11635.391
1896	12504.47
1897	13113.192
1898	12944.51
1899	13289.208
1900	14645.998
1901	14323.302
1902	14312.301
1903	15309.725
1904	16178.804
1905	16607.843
1906	18070.976
1907	18591.69
1908	18936.388
1909	19933.812
1910	20850.562
1911	22097.342
1912	24942.934
1913	27572.173
1914	25845.016
1915	24554.232
1916	22416.371
1917	8661.454
1918	14539.655
1919	21998.333
1920	22189.017
1921	23252.447
1922	27293.481
1923	27220.141
1924	30619.45
1925	33619.056
1926	34356.123
1927	37997.454
1928	38037.791
1929	41301.421
1930	40813.71
1931	44994.09
1932	41451.768
1933	38602.509
1934	38661.181
1935	37297.057
1936	39926.296
1937	44037.003
1938	43343.94
1939	40736.703
1940	33465.042
1941	37157.711
1942	34623.814
1943	34957.511
1944	23355.123
1945	14664.333
1946	31129.163
1947	44642.058
1948	47304.3
1949	50542.261
1950	51330.666
1951	55016.001
1952	54762.978
1953	55313.028
1954	58444.646
1955	61040.882
1956	65136.921
1957	64465.86
1958	66750.401
1959	67179.44
1960	73505.015
1961	75888.565
1962	83358.244
1963	91227.626
1964	96867.472
1965	100497.802
1966	103655.089
1967	106783.04
1968	113552.322
1969	115910.203
1970	141934.902
1971	140875.139
1972	157794.677
1973	165645.724
1974	160445.918
1975	153020.243
1976	169683.091
1977	164277.933
1978	170548.503
1979	187812.739
1980	177508.469
1981	164956.328
1982	134322.21
1983	138256.901
1984	145055.519
1985	147948.782
1986	145095.856
1987	152569.202
1988	146914.688
1989	163100.826
1990	158403.399
1991	165154.346
1992	162224.413
1993	164802.314
1994	165323.028
1995	178634.238
1996	185847.227
1997	178311.542
1998	178439.887
1999	173665.453
2000	173504.105
2001	176793.404
2002	181663.18
2003	182205.896
2004	184835.135
2005	181479.83
2006	179638.996
2007	176690.728
2008	177020.758
2009	172371.002
2010	183052.973
2011	174167.832
2012	170310.148
2013	173254.749
2014	167303.208