Year	Cubic Meters
1990	143820
1991	144240
1992	144590
1993	146480
1994	146830
1995	147100
1996	147230
1997	147180
1998	47620
1999	47870
2000	48130
2001	48340
2002	48570
2003	48790
2004	49030
2005	49270
2006	49420
2007	49570
2008	49730
2009	49900
2010	49900
2011	50190