Year	Cubic Meters
1990	3914100
1991	4016600
1992	4204900
1993	4422800
1994	4478400
1995	4552600
1996	4738600
1997	5022200
1998	5175500
1999	5060700
2000	2934000
2001	2985000
2002	3439000
2003	3739000
2004	5084000
2005	5702000
2006	6365000
2007	7173000
2008	9454000
2009	8390000
2010	11854000
2011	11854000