Year	US Dollars, Sum Over Component Sub-periods
1984-01-01	924000000
1985-01-01	1531000000
1986-01-01	1569000000
1987-01-01	2118000000
1988-01-01	3727000000
1989-01-01	3949000000
1990-01-01	4945000000
1991-01-01	5154000000
1992-01-01	5807000000
1993-01-01	6740000000
1994-01-01	7052000000
1995-01-01	9620000000
1996-01-01	6657000000
1997-01-01	10912000000
1998-01-01	13518000000
1999-01-01	7502000000
2000-01-01	11375000000
2001-01-01	9136000000
2002-01-01	7885000000
2003-01-01	10472000000
2004-01-01	13030000000
2005-01-01	16016000000
2006-01-01	13985000000
2007-01-01	13954000000
2008-01-01	18884000000
2009-01-01	18625000000
2010-01-01	16684000000
2011-01-01	20152000000
2012-01-01	22562000000
2013-01-01	23086000000