Year	Cubic Meters
1990	45269700
1991	45311700
1992	48890500
1993	41768900
1994	40114200
1995	39349100
1996	35069200
1997	35996400
1998	26813600
1999	26769900
2000	27725700
2001	23545500
2002	22690800
2003	26529400
2004	28470300
2005	28254300
2006	26190600
2007	27953200
2008	25652700
2009	22985200
2010	22113500
2011	20811000