Year	Tonnes
1950	245.689
1951	256.69
1952	242.022
1953	231.021
1954	308.028
1955	341.031
1956	297.027
1957	311.695
1958	330.03
1959	388.702
1960	341.031
1961	293.36
1962	330.03
1963	410.704
1964	498.712
1965	473.043
1966	414.371
1967	520.714
1968	638.058
1969	652.726
1970	663.727
1971	660.06
1972	839.743
1973	806.74
1974	744.401
1975	667.394
1976	762.736
1977	803.073
1978	935.085
1979	905.749
1980	1023.093
1981	1144.104
1982	1312.786
1983	997.424
1984	1364.124
1985	1199.109
1986	1485.135
1987	1855.502
1988	2013.183
1989	2170.864
1990	2159.863
1991	2057.187
1992	2024.184
1993	2651.241
1994	2420.22
1995	2123.193
1996	2240.537
1997	2519.229
1998	2145.195
1999	2346.88
2000	2064.521
2001	2486.226
2002	2299.209
2003	2581.568
2004	2574.234
2005	2698.912
2006	2574.234
2007	2724.581
2008	2559.566
2009	2398.218
2010	2559.566
2011	2541.231
2012	2680.577
2013	2339.546
2014	2346.88