Year	Tonnes
1950	62339
1951	128345
1952	194351
1953	260357
1954	333697
1955	414371
1956	506046
1957	616056
1958	726066
1959	869079
1960	1026760
1961	1202776
1962	1389793
1963	1595145
1964	1811498
1965	2016850
1966	2269873
1967	2559566
1968	2838258
1969	3149953
1970	3454314
1971	3795345
1972	4173046
1973	4580083
1974	4965118
1975	5368488
1976	5863533
1977	6387914
1978	6915962
1979	7455011
1980	8082068
1981	8870473
1982	9633209
1983	10447283
1984	11323696
1985	12214777
1986	13164530
1987	14176622
1988	15306058
1989	16494166
1990	17777616
1991	19064733
1992	20406855
1993	21781980
1994	23201109
1995	24664242
1996	26215383
1997	27821529
1998	29893384
1999	31785556
2000	33699730
2001	35775252
2002	37887444
2003	40116980
2004	42430857
2005	44653059
2006	46809255
2007	49141467
2008	51429675
2009	53739885
2010	56039094
2011	58470315
2012	61015213
2013	63571112
2014	66138012