Year	Cubic Meters
1990	36500
1991	36500
1992	36500
1993	36500
1994	36500
1995	37040
1996	37040
1997	37040
1998	36730
1999	36690
2000	29290
2001	29060
2002	29250
2003	29030
2004	29110
2005	26680
2006	26650
2007	26650
2008	26650
2009	26650
2010	26620
2011	26650