Year Tonnes
1860 36.67
1861 73.34
1862 73.34
1863 77.007
1864 47.671
1865 62.339
1866 69.673
1867 62.339
1868 88.008
1869 69.673
1870 91.675
1871 113.677
1872 91.675
1873 88.008
1874 124.678
1875 84.341
1876 95.342
1877 113.677
1878 128.345
1879 77.007
1880 99.009
1881 99.009
1882 121.011
1883 117.344
1884 143.013
1885 220.02
1886 128.345
1887 128.345
1888 121.011
1889 161.348
1890 209.019
1891 220.02
1892 194.351
1893 194.351
1894 220.02
1895 234.688
1896 297.027
1897 517.047
1898 487.711
1899 737.067
1900 601.388
1901 421.705
1902 399.703
1903 513.38
1904 528.048
1905 586.72
1906 616.056
1907 887.414
1908 1408.128
1909 1283.45
1910 1063.43
1911 1316.453
1912 1485.135
1913 1664.818
1914 689.396
1915 106.343
1916 179.683
1917 121.011
1918 73.34
1919 238.355
1920 275.025
1921 282.359
1922 711.398
1923 1477.801
1924 1745.492
1925 1712.489
1926 1598.812
1927 2852.926
1928 3131.618
1929 3355.305
1930 2651.241
1931 3014.274
1932 3025.275
1933 3226.96
1934 3956.693
1935 3520.32
1936 4968.785
1937 6787.617
1938 5702.185
1939 4877.11
1940 2317.544
1941 3248.962
1942 2812.589
1943 3949.359
1944 2728.248
1945 641.725
1946 3285.632
1947 5456.496
1948 8467.103
1949 4939.449
1950 6552.929
1951 7986.726
1952 8665.121
1953 7576.022
1954 9163.833
1955 10938.661
1956 12181.774
1957 12255.114
1958 10619.632
1959 13571.567
1960 15104.373
1961 14939.358
1962 16809.528
1963 19358.093
1964 22852.744
1965 25327.969
1966 29519.35
1967 28617.268
1968 33314.695
1969 37935.115
1970 40395.672
1971 40582.689
1972 44161.681
1973 49387.156
1974 46680.91
1975 46101.524
1976 51279.328
1977 50219.565
1978 51913.719
1979 54333.939
1980 58246.628
1981 51510.349
1982 43083.583
1983 41576.446
1984 42254.841
1985 49665.848
1986 53329.181
1987 57656.241
1988 52185.077
1989 52584.78
1990 51745.037
1991 53699.548
1992 47472.982
1993 50402.915
1994 57223.535
1995 52713.125
1996 61282.904
1997 59933.448
1998 56988.847
1999 55423.038
2000 52427.099
2001 57051.186
2002 61682.607
2003 69130.284
2004 67091.432
2005 54645.634
2006 66200.351
2007 63985.483
2008 56519.471
2009 53149.498
2010 62082.31
2011 56816.498
2012 49134.133
2013 47219.959
2014 47300.633