Year	Tonnes
1945	25.669
1946	36.67
1947	44.004
1948	51.338
1949	58.672
1950	7425.675
1951	9017.153
1952	9409.522
1953	8661.454
1954	8789.799
1955	9893.566
1956	10377.61
1957	10846.986
1958	10095.251
1959	10428.948
1960	11518.047
1961	11591.387
1962	11551.05
1963	11448.374
1964	12306.452
1965	12203.776
1966	11620.723
1967	11360.366
1968	12269.782
1969	13193.866
1970	13747.583
1971	13201.2
1972	13494.56
1973	14169.288
1974	14411.31
1975	11844.41
1976	11840.743
1977	10927.66
1978	11848.077
1979	12123.102
1980	11026.669
1981	9427.857
1982	8859.472
1983	8291.087
1984	8929.145
1985	9167.5
1986	9009.819
1987	8668.788
1988	8929.145
1989	9658.878
1990	10003.576
1991	10615.965
1992	10571.961
1993	10788.314
1994	10190.593
1995	8316.756
1996	8437.767
1997	7939.055
1998	7356.002
1999	7686.032
2000	8239.749
2001	8800.8
2002	9416.856
2003	9904.567
2004	11268.691
2005	11547.383
2006	11349.365
2007	11019.335
2008	10938.661
2009	10392.278
2010	10967.997
2011	10938.661
2012	10663.636
2013	10051.247
2014	9658.878