Year	Tonnes
1950	121.011
1951	132.012
1952	157.681
1953	168.682
1954	157.681
1955	172.349
1956	194.351
1957	165.015
1958	176.016
1959	198.018
1960	194.351
1961	168.682
1962	231.021
1963	242.022
1964	425.372
1965	344.698
1966	322.696
1967	355.699
1968	396.036
1969	432.706
1970	520.714
1971	550.05
1972	579.386
1973	630.724
1974	671.061
1975	623.39
1976	484.044
1977	766.403
1978	711.398
1979	839.743
1980	795.739
1981	1081.765
1982	839.743
1983	715.065
1984	583.053
1985	579.386
1986	605.055
1987	476.71
1988	553.717
1989	630.724
1990	814.074
1991	671.061
1992	748.068
1993	751.735
1994	748.068
1995	762.736
1996	821.408
1997	792.072
1998	770.07
1999	784.738
2000	843.41
2001	1056.096
2002	891.081
2003	1048.762
2004	1353.123
2005	1096.433
2006	1217.444
2007	1158.772
2008	894.748
2009	792.072
2010	1221.111
2011	1089.099
2012	1059.763
2013	1151.438
2014	1169.773