Year	Cubic Meters
1990	5503000
1991	5307000
1992	4968000
1993	4085000
1994	4202000
1995	4215000
1996	3692000
1997	4316000
1998	4188000
1999	4757000
2000	5419000
2001	5344000
2002	5403000
2003	5274000
2004	5175000
2005	5370000
2006	5320000
2007	5117000
2008	5384000
2009	5244000
2010	5741000
2011	6232000