Year	Tonnes
1950	58.672
1951	40.337
1952	58.672
1953	69.673
1954	4459.072
1955	2486.226
1956	2332.212
1957	2959.269
1958	1884.838
1959	2603.57
1960	3633.997
1961	2665.909
1962	3887.02
1963	2918.932
1964	3633.997
1965	3931.024
1966	3465.315
1967	3054.611
1968	11646.392
1969	4679.092
1970	2511.895
1971	1972.846
1972	1496.136
1973	2731.915
1974	2247.871
1975	2170.864
1976	2566.9
1977	2981.271
1978	3105.949
1979	3223.293
1980	3318.635
1981	4231.718
1982	5947.874
1983	6329.242
1984	7172.652
1985	8657.787
1986	8269.085
1987	8683.456
1988	9603.873
1989	9996.242
1990	9596.539
1991	9207.837
1992	9952.238
1993	8705.458
1994	9064.824
1995	10465.618
1996	10637.967
1997	13358.881
1998	12200.109
1999	13894.263
2000	14642.331
2001	16208.14
2002	15764.433
2003	17304.573
2004	18881.383
2005	20043.822
2006	21316.271
2007	20971.573
2008	22339.364
2009	24561.566
2010	23432.13
2011	19666.121
2012	18668.697
2013	25496.651
2014	22698.73