Year	Cubic Meters
1990	131000
1991	131000
1992	131000
1993	131000
1994	131000
1995	131000
1996	131000
1997	131000
1998	131000
1999	131000
2000	87900
2001	90700
2002	91200
2003	84700
2004	83200
2005	85700
2006	85700
2007	75700
2008	75700
2009	75700
2010	75700
2011	75700