Year	Cubic Meters
1992	12000
1993	11000
1994	21000
1995	18000
1996	13000
1997	13000
1998	13000
1999	7500
2000	24200
2001	22200
2002	22200
2003	22200
2004	22200
2005	22200
2006	25000
2007	25000
2008	28300
2009	25000
2010	25000
2011	26000