Year	Cubic Meters
1990	1200
1991	1200
1992	1200
1993	1200
1994	1100
1995	1100
1996	1100
1997	1100
1998	1200
1999	1200
2000	1300
2001	1300
2002	1400
2003	1400
2004	1500
2005	1500
2006	1600
2007	1600
2008	1700
2009	1700
2010	1700
2011	1700