Year	Cubic Meters
1990	28182000
1991	28492000
1992	27873000
1993	28154000
1994	30518000
1995	31023900
1996	32129900
1997	32966900
1998	30616000
1999	29515300
2000	30959200
2001	30553500
2002	30566500
2003	33159400
2004	33776900
2005	34564100
2006	34764100
2007	31511800
2008	31867300
2009	30887600
2010	30887600
2011	30887600