Year	Tonnes
1950	201.685
1951	139.346
1952	176.016
1953	187.017
1954	187.017
1955	128.345
1956	220.02
1957	220.02
1958	209.019
1959	223.687
1960	179.683
1961	187.017
1962	253.023
1963	209.019
1964	308.028
1965	304.361
1966	275.025
1967	498.712
1968	638.058
1969	572.052
1970	498.712
1971	396.036
1972	689.396
1973	678.395
1974	693.063
1975	590.387
1976	619.723
1977	641.725
1978	630.724
1979	660.06
1980	590.387
1981	542.716
1982	502.379
1983	597.721
1984	627.057
1985	707.731
1986	799.406
1987	931.418
1988	854.411
1989	1052.429
1990	1463.133
1991	1521.805
1992	1708.822
1993	1774.828
1994	1624.481
1995	1829.833
1996	1950.844
1997	1998.515
1998	2170.864
1999	2427.554
2000	2691.578
2001	2863.927
2002	2885.929
2003	3061.945
2004	3091.281
2005	3296.633
2006	3630.33
2007	3689.002
2008	3769.676
2009	3711.004
2010	3916.356
2011	3920.023
2012	3967.694
2013	4070.37
2014	4228.051