Year	US Dollars, Sum Over Component Sub-periods
1995-01-01	15367530000
1996-01-01	13825410000
1997-01-01	13830800000
1998-01-01	13237470000
1999-01-01	12922950000
2000-01-01	9367830000
2001-01-01	7895180000
2002-01-01	11325410000
2003-01-01	10668090000
2004-01-01	11513770000
2005-01-01	7447000000
2006-01-01	7444480000
2007-01-01	8699690000
2008-01-01	-6659530000
2009-01-01	-3024450000
2010-01-01	9069680000
2011-01-01	-5726130000
2012-01-01	-9375250000
2013-01-01	-9633640000