Year	US Dollars, Sum Over Component Sub-periods
1998-01-01	183500000000
1999-01-01	194700000000
2000-01-01	249100000000
2001-01-01	266100000000
2002-01-01	325700000000
2003-01-01	438300000000
2004-01-01	593400000000
2005-01-01	762500000000
2006-01-01	969700000000
2007-01-01	1220100000000
2008-01-01	1434700000000
2009-01-01	1203800000000
2010-01-01	1581400000000
2011-01-01	1903800000000
2012-01-01	2058100000000