Year	Cubic Meters
1990	23661000
1991	23791000
1992	24215000
1993	24188000
1994	24277000
1995	24218000
1996	28982000
1997	30860000
1998	31844000
1999	33055000
2000	33560000
2001	34194000
2002	34194000
2003	34194000
2004	28680000
2005	29320000
2006	29370000
2007	32481000
2008	32650000
2009	32650000
2010	32650000
2011	32650000