Year	Tonnes
1950	55005
1951	117344
1952	201685
1953	297027
1954	392369
1955	520714
1956	649059
1957	795739
1958	942419
1959	1103767
1960	1283450
1961	1485135
1962	1683153
1963	1939843
1964	2207534
1965	2511895
1966	2852926
1967	3289299
1968	3791678
1969	4349062
1970	5042125
1971	5867200
1972	7135982
1973	8481771
1974	10069582
1975	11602388
1976	13175531
1977	14756008
1978	16431827
1979	18228657
1980	20058490
1981	21990999
1982	23938176
1983	25947692
1984	27993878
1985	30120738
1986	32185259
1987	34521138
1988	36721338
1989	38756523
1990	40898051
1991	42962572
1992	45016092
1993	47010940
1994	49192805
1995	51253659
1996	53442858
1997	56020759
1998	58884686
1999	61330575
2000	63996484
2001	67205109
2002	70692426
2003	74638118
2004	79126526
2005	83512258
2006	87820983
2007	93941206
2008	98737642
2009	103831105
2010	108594538
2011	113922689
2012	119001484
2013	125187713
2014	131505954