Year	Tonnes
1950	62.339
1951	66.006
1952	66.006
1953	66.006
1954	73.34
1955	80.674
1956	91.675
1957	110.01
1958	110.01
1959	143.013
1960	157.681
1961	176.016
1962	187.017
1963	205.352
1964	216.353
1965	205.352
1966	253.023
1967	289.693
1968	278.692
1969	311.695
1970	304.361
1971	341.031
1972	377.701
1973	407.037
1974	385.035
1975	403.37
1976	495.045
1977	524.381
1978	528.048
1979	539.049
1980	627.057
1981	788.405
1982	762.736
1983	814.074
1984	876.413
1985	891.081
1986	949.753
1987	1012.092
1988	1129.436
1989	1188.108
1990	1283.45
1991	1287.117
1992	1342.122
1993	1375.125
1994	1419.129
1995	1463.133
1996	1551.141
1997	1606.146
1998	2071.855
1999	1892.172
2000	1914.174
2001	2075.522
2002	2112.192
2003	2229.536
2004	2313.877
2005	2222.202
2006	2156.196
2007	2332.212
2008	2288.208
2009	2310.21
2010	2299.209
2011	2431.221
2012	2544.898
2013	2555.899
2014	2566.9