Year	Tonnes
1950	113.677
1951	132.012
1952	146.68
1953	157.681
1954	216.353
1955	267.691
1956	264.024
1957	253.023
1958	275.025
1959	253.023
1960	286.026
1961	297.027
1962	304.361
1963	249.356
1964	300.694
1965	304.361
1966	304.361
1967	260.357
1968	264.024
1969	315.362
1970	385.035
1971	403.37
1972	392.369
1973	421.705
1974	473.043
1975	484.044
1976	674.728
1977	707.731
1978	755.402
1979	755.402
1980	751.735
1981	766.403
1982	825.075
1983	894.748
1984	913.083
1985	942.419
1986	843.41
1987	913.083
1988	1023.093
1989	1037.761
1990	993.757
1991	997.424
1992	909.416
1993	663.727
1994	300.694
1995	902.082
1996	1034.094
1997	1367.791
1998	1232.112
1999	1331.121
2000	1367.791
2001	1569.476
2002	1826.166
2003	1734.491
2004	1987.514
2005	2075.522
2006	2112.192
2007	2390.884
2008	2398.218
2009	2269.873
2010	2126.86
2011	2218.535
2012	2313.877
2013	2405.552
2014	2860.26