Year Cubic Meters 1990 28383090 1991 28581810 1992 28568600 1993 28634150 1994 28586670 1995 28519260 1996 28508240 1997 28476070 1998 28468000 1999 28465850 2000 28458890 2001 28386730 2002 28017750 2003 28009950 2004 27976290 2005 27943780 2006 27866200 2007 27790000 2008 27714960 2009 27641260 2010 27568830 2011 27568830