Year	Cubic Meters
1990	10100
1991	10100
1992	10500
1993	10500
1994	10500
1995	10500
1996	10500
1997	10500
1998	10500
1999	10500
2000	11900
2001	11900
2002	11600
2003	11600
2004	11600
2005	12800
2006	12800
2007	12800
2008	12800
2009	12800
2010	12800
2011	12800