Year	Tonnes
1830	0.30846
1831	0.37015
1832	0.24677
1833	0.30846
1850	1.91247
1855	5.79909
1858	8.14341
1859	8.63695
1860	11.41311
1861	14.49773
1862	13.07881
1863	13.69573
1864	15.36143
1865	14.68281
1866	46.39275
1867	53.24061
1868	44.2952
1869	60.08848
1870	65.20895
1871	88.03517
1872	90.37949
1873	84.82716
1874	102.96475
1875	118.51126
1876	147.13657
1877	150.1595
1878	196.24379
1879	201.36426
1880	236.22051
1881	248.80578
1882	262.06966
1883	298.28315
1884	302.84839
1885	329.8697
1886	338.32157
1887	358.00147
1888	373.42459
1889	403.28375
1890	456.70944
1891	502.85542
1892	532.28273
1893	623.89607
1894	635.43256
1895	730.13052
1896	743.27102
1897	859.37627
1898	963.82165
1899	1118.11454
1900	1266.60835
1901	1300.35413
1902	1255.93555
1903	1228.54409
1904	1366.85863
1905	1220.09222
1906	1391.65901
1907	1558.78394
1908	1568.34628
1909	1655.57945
1910	1623.62274
1911	1683.34106
1912	1906.85292
1913	2071.44847
1914	1869.52897
1915	1715.97639
1916	1828.93532
1917	1683.21768
1918	671.2759
1919	573.36993
1920	522.84378
1921	567.0156
1922	691.51103
1923	763.87631
1924	910.08749
1925	898.24254
1926	1301.4646
1927	1618.07042
1928	1797.59554
1929	1935.91008
1930	2631.86297
1931	3161.80139
1932	3562.30898
1933	3981.13924
1934	4815.65345
1935	5451.02432
1936	6250.62058
1937	6391.52621
1938	6745.94951
1939	6828.67913
1940	8186.71574
1941	7192.35631
1942	4949.8346
1943	6318.72908
1944	5917.78964
1945	6265.30339
1946	7041.20973
1947	8478.82964
1948	9022.46379
1949	10256.37512
1950	11432.60398
1951	12390.56484
1952	13268.57224
1953	14037.63072
1954	15331.56884
1955	17384.75633
1956	19060.75599
1957	20858.53661
1958	22264.13811
1959	23408.04011
1960	24371.42991
1961	25133.45545
1962	26378.7182
1963	28289.45775
1964	30085.88113
1965	31915.43337
1966	33704.45366
1967	35243.00246
1968	36233.1668
1969	37734.51504
1970	39689.4881
1971	42125.60083
1972	44329.68813
1973	46210.50682
1974	47979.35367
1975	50442.67278
1976	52388.63874
1977	54174.75947
1978	56038.1192
1979	56504.45267
1980	58731.79804
1981	57622.19706
1982	58711.68629
1983	59553.35682
1984	60089.3411
1985	64804.68257
1986	64981.6783
1987	67719.28219
1988	69580.2976
1989	68122.87441
1990	63871.58378
1991	61563.23619
1992	56240.779
1993	48452.071
1994	41976.149
1995	33333.03
1996	31257.508
1997	29809.043
1998	31675.546
1999	28576.931
2000	29508.349
2001	28771.282
2002	29614.692
2003	30615.783
2004	32089.917
2005	34337.788
2006	39167.227
2007	30509.44
2008	35503.894
2009	31902.9
2010	30678.122
2011	33446.707
2012	35555.232
2013	35643.24
2014	37487.741