Year	Tonnes
1950	212686
1951	447374
1952	715065
1953	1026760
1954	1364124
1955	1675819
1956	2016850
1957	2390884
1958	2709913
1959	3076613
1960	3509319
1961	3938358
1962	4433403
1963	4965118
1964	5570173
1965	6365912
1966	7462345
1967	8797133
1968	10249265
1969	11771070
1970	13380883
1971	15097039
1972	16842531
1973	18951056
1974	20553535
1975	22574052
1976	24572567
1977	26472073
1978	28866624
1979	31162166
1980	33534715
1981	35566233
1982	37440070
1983	38815195
1984	40370003
1985	41968815
1986	43728975
1987	45489135
1988	47366639
1989	49222141
1990	50993302
1991	53046822
1992	55115010
1993	57157529
1994	59203715
1995	61268236
1996	63354759
1997	65463284
1998	67571809
1999	69698669
2000	71895202
2001	74264084
2002	75829893
2003	77373700
2004	78935842
2005	80530987
2006	82276479
2007	84040306
2008	85983816
2009	87985998
2010	90387883
2011	92357062
2012	94615934
2013	96533775
2014	98524956