Year	Tonnes
1959	99009
1960	187017
1961	275025
1962	348365
1963	421705
1964	495045
1965	583053
1966	667394
1967	759069
1968	942419
1969	1129436
1970	1338455
1971	1521805
1972	1690487
1973	1851835
1974	1965512
1975	2068188
1976	2196533
1977	2324878
1978	2471558
1979	2574234
1980	2680577
1981	2816256
1982	2959269
1983	3105949
1984	3256296
1985	3417644
1986	3578992
1987	3839349
1988	4070370
1989	4319726
1990	4517744
1991	4723096
1992	4939449
1993	5163136
1994	5397824
1995	5632512
1996	5867200
1997	6112889
1998	6362245
1999	6626269
2000	6893960
2001	7139649
2002	7385338
2003	7620026
2004	7854714
2005	8089402
2006	8338758
2007	8591781
2008	8844804
2009	9097827
2010	9361851
2011	9640543
2012	9933903
2013	10230930
2014	10531624