Year	Cubic Meters
1990	31203430
1991	31554370
1992	31216300
1993	31163060
1994	31215010
1995	31595300
1996	31641130
1997	31324710
1998	31032970
1999	30220320
2000	30868550
2001	30798190
2002	30729500
2003	26437000
2004	26487000
2005	26004000
2006	26121000
2007	27450000
2008	27850000
2009	27850000
2010	28200000
2011	27100000