Year	Tonnes
1962	3667
1963	7334
1964	14668
1965	22002
1966	33003
1967	36670
1968	51338
1969	69673
1970	88008
1971	110010
1972	132012
1973	157681
1974	183350
1975	209019
1976	234688
1977	264024
1978	293360
1979	322696
1980	352032
1981	396036
1982	432706
1983	473043
1984	513380
1985	561051
1986	616056
1987	678395
1988	744401
1989	810407
1990	876413
1991	942419
1992	1012092
1993	1085432
1994	1166106
1995	1250447
1996	1345789
1997	1444798
1998	1547474
1999	1650150
2000	1752826
2001	1859169
2002	1972846
2003	2093857
2004	2218535
2005	2350547
2006	2493560
2007	2643907
2008	2805255
2009	2970270
2010	3142619
2011	3318635
2012	3494651
2013	3670667
2014	3850350