Year	Cubic Meters
1990	6904200
1991	6965200
1992	6975200
1993	6995200
1994	8143600
1995	8393100
1996	8642200
1997	8910100
1998	8994000
1999	9252600
2000	9093600
2001	9107600
2002	9107600
2003	9107600
2004	9092600
2005	8942200
2006	9151300
2007	9197800
2008	9201500
2009	9263900
2010	9227300
2011	9227300