Year Tonnes
1884 22.002
1885 36.67
1886 47.671
1887 47.671
1888 80.674
1889 132.012
1890 297.027
1891 297.027
1892 480.377
1893 1800.497
1894 2434.888
1895 3340.637
1896 4261.054
1897 4781.768
1898 6054.217
1899 5522.502
1900 2332.212
1901 3912.689
1902 5830.53
1903 7788.708
1904 8775.131
1905 10036.579
1906 11474.043
1907 12662.151
1908 13017.85
1909 14987.029
1910 16992.878
1911 16354.82
1912 17363.245
1913 18998.727
1914 18415.674
1915 18525.684
1916 21829.651
1917 23358.79
1918 22240.355
1919 23157.105
1920 25687.335
1921 25434.312
1922 21803.982
1923 26464.739
1924 27799.527
1925 28976.634
1926 30454.435
1927 29585.356
1928 29647.695
1929 30795.466
1930 28745.613
1931 25588.326
1932 23476.134
1933 25353.638
1934 28895.96
1935 32185.259
1936 35283.874
1937 36849.683
1938 38734.521
1939 40193.987
1940 41554.444
1941 44367.033
1942 48466.739
1943 48807.77
1944 54616.298
1945 55918.083
1946 56094.099
1947 55885.08
1948 57150.195
1949 60641.179
1950 61088.553
1951 65202.927
1952 70949.116
1953 71062.793
1954 73967.057
1955 83013.546
1956 87344.273
1957 89735.157
1958 96343.091
1959 94560.929
1960 97934.569
1961 102213.958
1962 105767.281
1963 109826.65
1964 119657.877
1965 128260.659
1966 128356.001
1967 133885.837
1968 138084.552
1969 143280.691
1970 149763.947
1971 168568.323
1972 171725.61
1973 173533.441
1974 176734.732
1975 185201.835
1976 193115.221
1977 199950.509
1978 202099.371
1979 218908.899
1980 228454.1
1981 257368.395
1982 280749.187
1983 292230.564
1984 315948.72
1985 324214.138
1986 330855.075
1987 329025.242
1988 343055.184
1989 341108.007
1990 313304.813
1991 326410.671
1992 301687.757
1993 321049.517
1994 339168.164
1995 362259.263
1996 364400.791
1997 386131.433
1998 377726.669
1999 375236.776
2000 378665.421
2001 372042.819
2002 356637.752
2003 404459.099
2004 450186.589
2005 416915.898
2006 447894.714
2007 466578.079
2008 496772.157
2009 503112.4
2010 474099.096
2011 470582.443
2012 468770.945
2013 466376.394
2014 489771.854