Year Tonnes
1830 113.677
1831 69.673
1832 88.008
1833 66.006
1834 69.673
1835 51.338
1836 84.341
1837 69.673
1838 62.339
1839 139.346
1840 135.679
1841 143.013
1842 84.341
1843 88.008
1844 187.017
1845 88.008
1846 62.339
1847 165.015
1848 0
1849 0
1850 0
1851 275.025
1852 344.698
1853 344.698
1854 436.373
1855 454.708
1856 476.71
1857 546.383
1858 381.368
1859 770.07
1860 905.749
1861 960.754
1862 1158.772
1863 1210.11
1864 1210.11
1865 1257.781
1866 1430.13
1867 1690.487
1868 1807.831
1869 1965.512
1870 2123.193
1871 2632.906
1872 2797.921
1873 2918.932
1874 2559.566
1875 2636.573
1876 2764.918
1877 2889.596
1878 2878.595
1879 2871.261
1880 3314.968
1881 3553.323
1882 3586.326
1883 4081.371
1884 4334.394
1885 4382.065
1886 4099.706
1887 4088.705
1888 4433.403
1889 4756.099
1890 5258.478
1891 5526.169
1892 5757.19
1893 5999.212
1894 6439.252
1895 6868.291
1896 7381.671
1897 7469.679
1898 8540.443
1899 8280.086
1900 9592.872
1901 9625.875
1902 8855.805
1903 9182.168
1904 9284.844
1905 9438.858
1906 10172.258
1907 10212.595
1908 10780.98
1909 11862.745
1910 11686.729
1911 12005.758
1912 12313.786
1913 13036.185
1914 11602.388
1915 11774.737
1916 11844.41
1917 11727.066
1918 10659.969
1919 4759.766
1920 5592.175
1921 9244.507
1922 11019.335
1923 11870.079
1924 11272.358
1925 10139.255
1926 11782.071
1927 13098.524
1928 13762.251
1929 15126.375
1930 12526.472
1931 11199.018
1932 10219.929
1933 10014.577
1934 10582.962
1935 11089.008
1936 11910.416
1937 13633.906
1938 14785.344
1939 14455.314
1940 15837.773
1941 17869.291
1942 18855.714
1943 19226.081
1944 15870.776
1945 8206.746
1946 10806.649
1947 13850.259
1948 16395.157
1949 20428.857
1950 18408.34
1951 22207.352
1952 27234.809
1953 31796.557
1954 34040.761
1955 35738.582
1956 33193.684
1957 38481.498
1958 39280.904
1959 41943.146
1960 45371.791
1961 48976.452
1962 50560.596
1963 56281.116
1964 62401.339
1965 61293.905
1966 61733.945
1967 58829.681
1968 61154.559
1969 62419.674
1970 70003.03
1971 69280.631
1972 69430.978
1973 73068.642
1974 74102.736
1975 75389.853
1976 80013.94
1977 83204.23
1978 88187.683
1979 86229.505
1980 86860.229
1981 86618.207
1982 86871.23
1983 89137.436
1984 90853.592
1985 86104.827
1986 83537.927
1987 84436.342
1988 78264.781
1989 76090.25
1990 69647.331
1991 66585.386
1992 60395.49
1993 61917.295
1994 58884.686
1995 60369.821
1996 62063.975
1997 60886.868
1998 59163.378
1999 58800.345
2000 55826.408
2001 56977.846
2002 56064.763
2003 59053.368
2004 57458.223
2005 58019.274
2006 57388.55
2007 56035.427
2008 54843.652
2009 48510.743
2010 50223.232
2011 47843.349
2012 44583.386
2013 42141.164
2014 42086.159