Year Tonnes
1851 0
1852 0
1853 0
1854 0
1855 0
1856 0
1857 0
1858 0
1859 0
1860 278.692
1861 509.713
1862 355.699
1863 399.703
1864 267.691
1865 421.705
1866 696.73
1867 894.748
1868 733.4
1869 641.725
1870 601.388
1871 693.063
1872 707.731
1873 869.079
1874 891.081
1875 828.742
1876 931.418
1877 1067.097
1878 968.088
1879 1455.799
1880 2207.534
1881 1767.494
1882 2013.183
1883 2427.554
1884 2574.234
1885 2907.931
1886 2889.596
1887 3036.276
1888 3531.321
1889 3428.645
1890 3549.656
1891 4011.698
1892 4154.711
1893 3967.694
1894 4363.73
1895 4594.751
1896 4506.743
1897 4979.786
1898 5617.844
1899 5790.193
1900 10175.925
1901 11448.374
1902 11404.37
1903 11228.354
1904 11554.717
1905 12057.096
1906 14370.973
1907 15489.408
1908 16769.191
1909 14565.324
1910 17451.253
1911 19255.417
1912 20802.891
1913 22409.037
1914 24499.227
1915 21811.316
1916 19288.42
1917 20777.222
1918 22959.087
1919 21756.311
1920 25753.341
1921 23171.773
1922 24363.548
1923 24869.594
1924 27091.796
1925 28257.902
1926 27876.534
1927 28917.962
1928 26310.725
1929 23674.152
1930 22049.671
1931 19563.445
1932 20359.184
1933 21598.63
1934 22717.065
1935 25250.962
1936 27073.461
1937 28881.292
1938 28059.884
1939 32170.591
1940 29064.642
1941 34576.143
1942 36534.321
1943 35019.85
1944 34238.779
1945 32724.308
1946 35452.556
1947 38048.792
1948 38455.829
1949 37682.092
1950 54788.647
1951 59082.704
1952 60256.144
1953 59489.741
1954 67901.839
1955 70740.097
1956 73097.978
1957 74586.78
1958 77681.728
1959 83787.283
1960 88202.351
1961 90589.568
1962 94912.961
1963 101029.517
1964 108979.573
1965 120966.996
1966 120332.605
1967 129265.417
1968 134622.904
1969 142257.598
1970 147618.752
1971 152774.554
1972 157486.649
1973 170992.21
1974 172356.334
1975 175883.988
1976 174244.839
1977 187787.07
1978 202015.03
1979 205069.641
1980 220746.066
1981 230360.94
1982 234119.615
1983 225003.453
1984 236594.84
1985 241229.928
1986 239964.813
1987 256106.947
1988 261145.405
1989 277771.583
1990 263704.971
1991 261471.768
1992 267984.36
1993 277397.549
1994 278119.948
1995 281860.288
1996 302164.467
1997 305794.797
1998 316883.805
1999 325343.574
2000 329443.28
2001 324844.862
2002 341353.696
2003 336271.234
2004 342699.485
2005 350172.831
2006 365346.877
2007 372090.49
2008 385904.079
2009 394792.887
2010 390861.863
2011 391818.95
2012 388126.281
2013 372266.506
2014 361261.839