Year	Cubic Meters
1990	59180000
1991	59997000
1992	61117300
1993	62293600
1994	63787100
1995	65028900
1996	66151500
1997	67740100
1998	67835800
1999	68291700
2000	68766700
2001	69115600
2002	69482300
2003	69867200
2004	70270400
2005	70692300
2006	71047300
2007	71418000
2008	71806600
2009	72211200
2010	72632700
2011	72632700