Year	Cubic Meters
1990	6332000
1991	4607000
1992	4553000
1993	4407000
1994	4679000
1995	4749000
1996	4064000
1997	4486000
1998	4276000
1999	4736000
2000	9238000
2001	5662000
2002	4557000
2003	5120000
2004	5132000
2005	5284600
2006	5701500
2007	5520000
2008	4950400
2009	4701800
2010	4938000
2011	4861000