Year	Cubic Meters
1990	35840
1991	35660
1992	35560
1993	35590
1994	35100
1995	34100
1996	34780
1997	34310
1998	35030
1999	36490
2000	37060
2001	38310
2002	38810
2003	39550
2004	41750
2005	42550
2006	42550
2007	42550
2008	42550
2009	42550
2010	42550
2011	42550