Year	Tonnes
1830	0.18115
1831	0.21738
1832	0.14492
1833	0.18115
1850	1.12314
1855	3.40565
1858	4.7824
1859	5.07224
1860	6.70261
1861	8.51412
1862	7.68082
1863	8.04313
1864	9.02135
1865	8.62281
1866	27.24519
1867	31.26675
1868	26.01336
1869	35.28832
1870	38.29543
1871	51.70064
1872	53.0774
1873	49.81667
1874	60.46838
1875	69.59842
1876	86.40928
1877	88.18456
1878	115.2486
1879	118.25571
1880	138.72584
1881	146.11682
1882	153.90633
1883	175.17352
1884	177.85457
1885	193.72344
1886	198.68699
1887	210.24446
1888	219.30203
1889	236.8375
1890	268.21295
1891	295.31321
1892	312.59507
1893	366.39707
1894	373.17214
1895	428.78566
1896	436.50271
1897	504.68815
1898	566.02605
1899	656.63804
1900	743.84439
1901	763.66236
1902	737.57655
1903	721.49029
1904	802.71863
1905	716.52674
1906	817.28322
1907	915.43111
1908	921.04681
1909	972.27646
1910	953.50916
1911	988.5801
1912	1119.84249
1913	1216.50494
1914	1097.92316
1915	1007.74593
1916	1074.08362
1917	988.50764
1918	394.22195
1919	336.72445
1920	307.05183
1921	332.99273
1922	406.10549
1923	448.60363
1924	534.46946
1925	527.51324
1926	764.31451
1927	950.24843
1928	1055.67862
1929	1136.90696
1930	1545.62103
1931	1856.83935
1932	2092.04649
1933	2338.01403
1934	2828.10136
1935	3201.23727
1936	3670.81825
1937	3753.56827
1938	3961.71137
1939	4010.29621
1940	4807.83391
1941	4223.87386
1942	2906.90228
1943	3710.81651
1944	3475.35576
1945	3679.44107
1946	4135.10961
1947	4979.3844
1948	5298.64585
1949	6023.28817
1950	6714.05517
1951	7276.63934
1952	7792.26904
1953	8243.91602
1954	9003.81043
1955	10209.5912
1956	11193.85989
1957	12249.64721
1958	13075.11847
1959	13746.90078
1960	14312.67322
1961	14760.18995
1962	15491.49865
1963	16613.62365
1964	17668.6139
1965	18743.05982
1966	19793.70242
1967	20697.25
1968	21278.74639
1969	22160.44709
1970	23308.54921
1971	24739.21149
1972	26033.61159
1973	27138.16489
1974	28176.96019
1975	29623.60003
1976	30766.41254
1977	31815.35232
1978	32909.65245
1979	33183.51732
1980	34491.57625
1981	33839.93799
1982	34479.76517
1983	34974.05522
1984	35288.8241
1985	38058.01499
1986	38161.95974
1987	39769.67951
1988	40862.60289
1989	40006.69817
1990	37510.03163
1991	36154.40232
1992	33028.669
1993	28316.574
1994	33534.715
1995	34000.424
1996	30670.788
1997	30623.117
1998	32093.584
1999	37678.425
2000	37539.079
2001	38074.461
2002	39966.633
2003	44601.721
2004	46541.564
2005	48338.394
2006	49511.834
2007	56042.761
2008	56831.166
2009	50340.576
2010	57289.541
2011	62467.345
2012	64872.897
2013	66735.733
2014	68422.553