Year	Cubic Meters
1990	12828000
1991	10878000
1992	9870000
1993	10141000
1994	11972000
1995	12640000
1996	12646000
1997	13491000
1998	13991000
1999	14203000
2000	14441000
2001	14374000
2002	14541000
2003	15140000
2004	15601000
2005	15510000
2006	17678000
2007	18508000
2008	16187000
2009	15502000
2010	16736000
2011	15381000