Year	Cubic Meters
1990	4580700
1991	4089800
1992	4153800
1993	3815500
1994	3361500
1995	2975800
1996	3115400
1997	3549800
1998	4057400
1999	4717800
2000	5839400
2001	6086900
2002	6677000
2003	6329800
2004	5905800
2005	6141400
2006	6393200
2007	6623400
2008	6922500
2009	7170700
2010	7488300
2011	7488300