Year	Cubic Meters
1990	43230000
1991	34863000
1992	38482000
1993	42244000
1994	48745000
1995	50219000
1996	46597000
1997	51329000
1998	53660000
1999	53637000
2000	54261900
2001	52210000
2002	53388600
2003	54240400
2004	54398300
2005	52250200
2006	50811600
2007	56612200
2008	50670500
2009	41653100
2010	50951500
2011	50766800