Year	Tonnes
1962	40337
1963	73340
1964	135679
1965	183350
1966	260357
1967	344698
1968	407037
1969	451041
1970	491378
1971	550050
1972	612389
1973	667394
1974	729733
1975	784738
1976	828742
1977	880080
1978	938752
1979	1001091
1980	1063430
1981	1114768
1982	1166106
1983	1221111
1984	1276116
1985	1397127
1986	1455799
1987	1503470
1988	1569476
1989	1631815
1990	1697821
1991	1763827
1992	1826166
1993	1888505
1994	1950844
1995	2016850
1996	2101191
1997	2185532
1998	2266206
1999	2350547
2000	2434888
2001	2522896
2002	2607237
2003	2691578
2004	2750250
2005	2808922
2006	2856593
2007	2955602
2008	3050944
2009	3171955
2010	3292966
2011	3424978
2012	3538655
2013	3644998
2014	3799012