Year	US Dollars, Sum Over Component Sub-periods
1988-01-01	0
1989-01-01	0
1990-01-01	366000000
1991-01-01	519000000
1992-01-01	773000000
1993-01-01	448000000
1994-01-01	452000000
1995-01-01	623000000
1996-01-01	414000000
1997-01-01	932000000
1998-01-01	412000000
1999-01-01	401000000
2000-01-01	532000000
2001-01-01	463000000
2002-01-01	1288000000
2003-01-01	1813000000
2004-01-01	4380000000
2005-01-01	6957000000
2006-01-01	8933000000
2007-01-01	12109000000
2008-01-01	95183000000
2009-01-01	74846000000
2010-01-01	49483000000
2011-01-01	43554000000
2012-01-01	33454000000
2013-01-01	31450000000