Year	Tonnes
1962	3667
1963	7334
1964	14668
1965	18335
1966	25669
1967	33003
1968	40337
1969	47671
1970	62339
1971	77007
1972	91675
1973	106343
1974	121011
1975	132012
1976	143013
1977	168682
1978	194351
1979	220020
1980	234688
1981	253023
1982	271358
1983	293360
1984	315362
1985	341031
1986	370367
1987	399703
1988	429039
1989	458375
1990	487711
1991	517047
1992	546383
1993	575719
1994	608722
1995	641725
1996	678395
1997	711398
1998	740734
1999	770070
2000	795739
2001	821408
2002	858078
2003	894748
2004	931418
2005	968088
2006	1004758
2007	1045095
2008	1092766
2009	1140437
2010	1206443
2011	1246780
2012	1290784
2013	1342122
2014	1389793