Year	US Dollars, Sum Over Component Sub-periods
1988-01-01	28279600000
1989-01-01	29224600000
1990-01-01	36631500000
1991-01-01	37579600000
1992-01-01	41275900000
1993-01-01	37665700000
1994-01-01	42342900000
1995-01-01	50767900000
1996-01-01	51211800000
1997-01-01	48386500000
1998-01-01	48167600000
1999-01-01	49822000000
2000-01-01	50777500000
2001-01-01	50930500000
2002-01-01	55448500000
2003-01-01	64673400000
2004-01-01	74773200000
2005-01-01	82755200000
2006-01-01	90690900000
2007-01-01	100659700000
2008-01-01	114327900000
2009-01-01	90798300000
2010-01-01	94843700000
2011-01-01	110771200000
2012-01-01	105083200000
2013-01-01	109794400000