Year	Cubic Meters
1990	31004500
1991	31678900
1992	32671200
1993	33418100
1994	34378000
1995	34880400
1996	35430300
1997	35967000
1998	36409100
1999	36901300
2000	37265300
2001	37786000
2002	38316800
2003	38858000
2004	39480600
2005	40120000
2006	40746300
2007	41685200
2008	42357800
2009	43029500
2010	43729400
2011	43729400