Year Tonnes
1830 11.40082
1831 13.68098
1832 9.12066
1833 11.40082
1850 70.68509
1855 214.33543
1858 300.98166
1859 319.22298
1860 421.83036
1861 535.83857
1862 483.39479
1863 506.19643
1864 567.76086
1865 542.67906
1866 1714.68341
1867 1967.78163
1868 1637.15783
1869 2220.87984
1870 2410.13346
1871 3253.79418
1872 3340.44042
1873 3135.22565
1874 3805.5939
1875 4380.19525
1876 5438.1914
1877 5549.91944
1878 7253.20203
1879 7442.45565
1880 8730.74837
1881 9195.90185
1882 9686.13713
1883 11024.59346
1884 11193.32561
1885 12192.03749
1886 12504.41997
1887 13231.79232
1888 13801.83335
1889 14905.43277
1890 16880.05489
1891 18585.61764
1892 19673.25592
1893 23059.29962
1894 23485.69031
1895 26985.74222
1896 27471.41717
1897 31762.68603
1898 35623.00386
1899 41325.69429
1900 46814.0493
1901 48061.29907
1902 46419.58091
1903 45407.18805
1904 50519.31598
1905 45094.80557
1906 51435.94195
1907 57612.90652
1908 57966.33196
1909 61190.484
1910 60009.359
1911 62216.55785
1912 70477.59242
1913 76561.07026
1914 69098.09313
1915 63422.76467
1916 67597.74515
1917 62211.99752
1918 24810.46566
1919 21191.84522
1920 19324.39082
1921 20956.98832
1922 25558.35949
1923 28232.99199
1924 33636.98092
1925 33199.18941
1926 48102.34202
1927 59804.14423
1928 66439.42178
1929 71551.54971
1930 97274.08101
1931 116860.6907
1932 131663.51609
1933 147143.55022
1934 177987.33011
1935 201470.74026
1936 231023.94727
1937 236231.84209
1938 249331.38489
1939 252389.08496
1940 302582.33747
1941 265830.65237
1942 182946.68705
1943 233541.24844
1944 218722.4619
1945 231566.62632
1946 260244.25031
1947 313378.91452
1948 333471.72064
1949 379077.28297
1950 422550.89185
1951 457957.28012
1952 490408.57571
1953 518833.10148
1954 566657.26348
1955 642543.40516
1956 704488.62348
1957 770934.88576
1958 822886.1448
1959 865164.94769
1960 900771.9904
1961 928936.57746
1962 974961.68998
1963 1045582.93274
1964 1111979.0314
1965 1179599.57819
1966 1245722.05716
1967 1302587.06985
1968 1339183.70379
1969 1394673.77752
1970 1466929.89794
1971 1556969.01824
1972 1638432.44133
1973 1707947.80449
1974 1773324.6698
1975 1864369.34247
1976 1936292.55893
1977 2002307.87018
1978 2071177.94691
1979 2088413.7074
1980 2170736.75236
1981 2129725.72071
1982 2169993.41886
1983 2201101.69778
1984 2220911.76355
1985 2395191.54683
1986 2401733.33765
1987 2502915.61995
1988 2571699.05043
1989 2517832.45354
1990 2360704.06469
1991 2275387.16426
1992 2078668.286
1993 1938445.873
1994 1698378.384
1995 1631473.969
1996 1612966.62
1997 1526011.049
1998 1495505.276
1999 1531130.181
2000 1557899.281
2001 1557506.912
2002 1557085.207
2003 1604242.827
2004 1602115.967
2005 1615089.813
2006 1669262.404
2007 1666886.188
2008 1714978.893
2009 1574045.082
2010 1670531.186
2011 1763405.295
2012 1830830.424
2013 1778561.006
2014 1705345.684