Year	US Dollars, Sum Over Component Sub-periods
1998-01-01	46700000000
1999-01-01	35900000000
2000-01-01	34100000000
2001-01-01	32900000000
2002-01-01	42600000000
2003-01-01	42600000000
2004-01-01	57300000000
2005-01-01	132200000000
2006-01-01	215200000000
2007-01-01	313000000000
2008-01-01	357600000000
2009-01-01	247200000000
2010-01-01	253000000000
2011-01-01	243500000000
2012-01-01	322300000000