Year Tonnes
1884 3.667
1885 3.667
1886 7.334
1887 7.334
1888 7.334
1889 7.334
1890 11.001
1891 47.671
1892 66.006
1893 47.671
1894 40.337
1895 40.337
1896 40.337
1897 40.337
1898 88.008
1899 161.348
1900 245.689
1901 238.355
1902 99.009
1903 212.686
1904 278.692
1905 352.032
1906 429.039
1907 799.406
1908 1213.777
1909 1510.804
1910 1331.121
1911 1507.137
1912 1459.466
1913 1573.143
1914 1543.807
1915 1888.505
1916 1965.512
1917 2005.849
1918 1947.177
1919 1983.847
1920 2148.862
1921 2449.556
1922 2955.602
1923 2981.271
1924 3619.329
1925 4789.102
1926 4737.764
1927 4686.426
1928 5383.156
1929 7088.311
1930 5628.845
1931 4503.076
1932 4110.707
1933 6666.606
1934 6754.614
1935 7172.652
1936 7411.007
1937 8808.134
1938 8012.395
1939 5856.199
1940 5302.482
1941 5254.811
1942 6046.883
1943 6582.265
1944 6461.254
1945 6274.237
1946 5771.858
1947 5914.871
1948 6391.581
1949 6637.27
1950 4547.08
1951 4778.101
1952 5192.472
1953 5518.835
1954 6241.234
1955 6131.224
1956 6318.241
1957 6681.274
1958 7381.671
1959 7223.99
1960 8173.743
1961 8643.119
1962 9970.573
1963 10234.597
1964 12266.115
1965 11965.421
1966 13256.205
1967 13655.908
1968 14502.985
1969 15302.391
1970 17784.95
1971 18613.692
1972 18173.652
1973 19757.796
1974 21360.275
1975 21965.33
1976 22442.04
1977 23340.455
1978 22460.375
1979 22273.358
1980 24121.526
1981 24103.191
1982 23670.485
1983 20450.859
1984 20692.881
1985 19512.107
1986 21847.986
1987 25782.677
1988 25107.949
1989 21840.652
1990 21070.582
1991 20293.178
1992 20425.19
1993 23615.48
1994 23289.117
1995 23883.171
1996 24389.217
1997 27476.831
1998 27806.861
1999 29358.002
2000 30296.754
2001 27165.136
2002 27187.138
2003 26380.398
2004 31895.566
2005 37135.709
2006 34876.837
2007 42955.238
2008 41015.395
2009 51704.7
2010 57593.902
2011 49632.845
2012 55071.006
2013 57153.862
2014 61744.946