Year	Cubic Meters
1990	8186000
1991	8543000
1992	8916000
1993	9114000
1994	9311200
1995	9754500
1996	10141000
1997	9209600
1998	9224400
1999	9505100
2000	9763500
2001	10045500
2002	10328000
2003	10693500
2004	10953000
2005	11237800
2006	13315900
2007	13344500
2008	13377300
2009	13345000
2010	13380900
2011	13380900