Year	Cubic Meters
1990	5276000
1991	4429000
1992	4048000
1993	5249000
1994	5318000
1995	5323000
1996	5460000
1997	4945000
1998	5519000
1999	5795000
2000	6163000
2001	5787900
2002	5782000
2003	6355000
2004	7240000
2005	9302000
2006	7868500
2007	8131500
2008	9268600
2009	9087000
2010	9599100
2011	9212900