Year	Cubic Meters
1990	15590000
1991	15188000
1992	13924000
1993	13767000
1994	15305000
1995	16075000
1996	15631000
1997	15631000
1998	14874000
1999	14810000
2000	14321000
2001	15131000
2002	15839000
2003	16105000
2004	16290000
2005	15531000
2006	15716000
2007	14528000
2008	17027400
2009	13980000
2010	16089399
2011	15427772