Year	US Dollars, Sum Over Component Sub-periods
1988-01-01	9229700000
1989-01-01	9227900000
1990-01-01	11847200000
1991-01-01	13075800000
1992-01-01	13187700000
1993-01-01	12241100000
1994-01-01	12323000000
1995-01-01	13911600000
1996-01-01	15147200000
1997-01-01	14277200000
1998-01-01	15275400000
1999-01-01	20406100000
2000-01-01	24472200000
2001-01-01	26927200000
2002-01-01	27115700000
2003-01-01	31395500000
2004-01-01	36557800000
2005-01-01	43489200000
2006-01-01	52196100000
2007-01-01	61399600000
2008-01-01	72443400000
2009-01-01	56104200000
2010-01-01	62077900000
2011-01-01	66800200000
2012-01-01	65179700000
2013-01-01	70627700000