Year	Cubic Meters
1990	11795200
1991	11916500
1992	11842800
1993	11756800
1994	12056600
1995	12026600
1996	11863100
1997	11807700
1998	11560500
1999	11236600
2000	10298400
2001	10047300
2002	9862300
2003	9683000
2004	9511100
2005	9334100
2006	9165600
2007	9009000
2008	8853400
2009	8704000
2010	8525200
2011	8614300