Year	Tonnes
1939	14668
1940	22002
1941	25669
1942	36670
1943	51338
1944	69673
1994	935085
1995	1870170
1996	2882262
1997	3747674
1998	4338061
1999	4957784
2000	5566506
2001	6197230
2002	6802285
2003	7528351
2004	8298421
2005	9064824
2006	9625875
2007	10205261
2008	10619632
2009	11133012
2010	11646392
2011	12240446
2012	12900506
2013	13567900
2014	14264630