Year	Tonnes
1830	0.47946
1831	0.57535
1832	0.38357
1833	0.47946
1850	2.97263
1855	9.0138
1858	12.65767
1859	13.4248
1860	17.73992
1861	22.53449
1862	20.32899
1863	21.2879
1864	23.87697
1865	22.82216
1866	72.11037
1867	82.75432
1868	68.85006
1869	93.39827
1870	101.35726
1871	136.83709
1872	140.48097
1873	131.85074
1874	160.04282
1875	184.20746
1876	228.70109
1877	233.39977
1878	305.03068
1879	312.98967
1880	367.16834
1881	386.73019
1882	407.34685
1883	463.63513
1884	470.7311
1885	512.73155
1886	525.86868
1887	556.45805
1888	580.43091
1889	626.84237
1890	709.88436
1891	781.61116
1892	827.35138
1893	969.75017
1894	987.68187
1895	1134.87524
1896	1155.30012
1897	1335.76782
1898	1498.11203
1899	1737.93653
1900	1968.74724
1901	2021.19986
1902	1952.15802
1903	1909.58222
1904	2124.57083
1905	1896.44509
1906	2163.11919
1907	2422.88912
1908	2437.75229
1909	2573.34279
1910	2523.67102
1911	2616.49394
1912	2963.90864
1913	3219.74702
1914	2905.89432
1915	2667.22052
1916	2842.79775
1917	2616.30216
1918	1043.3948
1919	891.21508
1920	812.67999
1921	881.33826
1922	1074.8472
1923	1187.32786
1924	1414.59058
1925	1396.17942
1926	2022.9259
1927	2515.04079
1928	2794.0849
1929	3009.07351
1930	4090.82489
1931	4914.5324
1932	5537.05965
1933	6188.06667
1934	7485.19023
1935	8472.77621
1936	9715.62522
1937	9934.64127
1938	10485.53762
1939	10614.12805
1940	12724.9864
1941	11179.40811
1942	7693.75412
1943	9821.48937
1944	9198.29088
1945	9738.44738
1946	10944.47407
1947	13179.03239
1948	14024.0278
1949	15941.95257
1950	17770.21884
1951	19259.22118
1952	20623.94821
1953	21819.33095
1954	23830.5581
1955	27021.92125
1956	29627.00411
1957	32421.37668
1958	34606.16734
1959	36384.18649
1960	37881.62728
1961	39066.0784
1962	41001.6472
1963	43971.597
1964	46763.85996
1965	49607.61662
1966	52388.37261
1967	54779.80933
1968	56318.86701
1969	58652.48119
1970	61691.18516
1971	65477.7465
1972	68903.66012
1973	71827.10257
1974	74576.50206
1975	78405.35153
1976	81430.05534
1977	84206.30443
1978	87102.60961
1979	87827.45303
1980	91289.51773
1981	89564.81421
1982	91258.25712
1983	92566.50409
1984	93399.60895
1985	100728.87969
1986	101003.99225
1987	105259.17507
1988	108151.83637
1989	105886.4969
1990	99278.5216
1991	95690.55144
1992	87417.613
1993	76768.645
1994	65056.247
1995	60773.191
1996	60164.469
1997	59555.747
1998	58099.948
1999	56112.434
2000	53787.556
2001	52760.796
2002	52405.097
2003	53530.866
2004	58158.62
2005	59167.045
2006	62071.309
2007	60523.835
2008	63105.403
2009	61220.565
2010	63043.064
2011	64062.49
2012	63222.747
2013	63769.13
2014	63497.772