Year	Tonnes
1949	260.357
1950	352.032
1951	388.702
1952	194.351
1953	366.7
1954	608.722
1955	418.038
1956	506.046
1957	311.695
1958	168.682
1959	183.35
1960	176.016
1961	161.348
1962	190.684
1963	6138.558
1964	6274.237
1965	6292.572
1966	6277.904
1967	6688.608
1968	7080.977
1969	7172.652
1970	7568.688
1971	9152.832
1972	10784.647
1973	12467.8
1974	10487.62
1975	10956.996
1976	10384.944
1977	9926.569
1978	10531.624
1979	14359.972
1980	13098.524
1981	12860.169
1982	12354.123
1983	11268.691
1984	12332.121
1985	12405.461
1986	13296.542
1987	11499.712
1988	11928.751
1989	14326.969
1990	11774.737
1991	17704.276
1992	26802.103
1993	30722.126
1994	30223.414
1995	31789.223
1996	32298.936
1997	37495.075
1998	32401.612
1999	31407.855
2000	34730.157
2001	41396.763
2002	40905.385
2003	41521.441
2004	42944.237
2005	50956.632
2006	63475.77
2007	63277.752
2008	64843.561
2009	69221.959
2010	72507.591
2011	80435.645
2012	94124.556
2013	85023.062
2014	107853.804