Year Tonnes
1887 1085.432
1888 891.081
1889 1756.493
1890 1371.458
1891 938.752
1892 1386.126
1893 1554.808
1894 1994.848
1895 2266.206
1896 2306.543
1897 2082.856
1898 2350.547
1899 2922.599
1900 2071.855
1901 2493.56
1902 2816.256
1903 2863.927
1904 3799.012
1905 3986.029
1906 6259.569
1907 6259.569
1908 7623.693
1909 5940.54
1910 8914.477
1911 9952.238
1912 9486.529
1913 10153.923
1914 8679.789
1915 6945.298
1916 4990.787
1917 2233.203
1918 2522.896
1919 3729.339
1920 5896.536
1921 5544.504
1922 7304.664
1923 8452.435
1924 10967.997
1925 11246.689
1926 11268.691
1927 13384.55
1928 12750.159
1929 13142.528
1930 12779.495
1931 12856.502
1932 13113.192
1933 13245.204
1934 14253.629
1935 14011.607
1936 15111.707
1937 16728.854
1938 16365.821
1939 17396.248
1940 15881.777
1941 13956.602
1942 13494.56
1943 14092.281
1944 13967.603
1945 13681.577
1946 13718.247
1947 14532.321
1948 17410.916
1949 15383.065
1950 29952.056
1951 34997.848
1952 36130.951
1953 35170.197
1954 36787.344
1955 39599.933
1956 44341.364
1957 47656.332
1958 44238.688
1959 48998.454
1960 48815.104
1961 51180.319
1962 53695.881
1963 50083.886
1964 55727.399
1965 58866.351
1966 63138.406
1967 65543.958
1968 69082.613
1969 77329.696
1970 82734.854
1971 88939.418
1972 90156.862
1973 94065.884
1974 95569.354
1975 94931.296
1976 99786.404
1977 100791.162
1978 102639.33
1979 110703.063
1980 108737.551
1981 102041.609
1982 103424.068
1983 105213.564
1984 106522.683
1985 100596.811
1986 104212.473
1987 114942.115
1988 121473.042
1989 117090.977
1990 112147.861
1991 117098.311
1992 121352.031
1993 117927.053
1994 122408.127
1995 127963.632
1996 135000.605
1997 138003.878
1998 139815.376
1999 146984.361
2000 142136.587
2001 133720.822
2002 124714.67
2003 135062.944
2004 157589.325
2005 162110.736
2006 175436.614
2007 175176.257
2008 189107.19
2009 179961.692
2010 187919.082
2011 191633.753
2012 192356.152
2013 189851.591
2014 204024.546