Year	US Dollars, Sum Over Component Sub-periods
1995-01-01	2228000000
1996-01-01	2111000000
1997-01-01	1874000000
1998-01-01	1958000000
1999-01-01	1890000000
2000-01-01	1681000000
2001-01-01	1621000000
2002-01-01	1815000000
2003-01-01	2227000000
2004-01-01	2609000000
2005-01-01	2852000000
2006-01-01	3236000000
2007-01-01	4241000000
2008-01-01	5152000000
2009-01-01	4401000000
2010-01-01	4387000000
2011-01-01	4680000000
2012-01-01	4319000000
2013-01-01	4522000000