Year	US Dollars, Sum Over Component Sub-periods
1994-01-01	3859000000
1995-01-01	7138000000
1996-01-01	6343000000
1997-01-01	5743000000
1998-01-01	6624000000
1999-01-01	6982000000
2000-01-01	8996000000
2001-01-01	8968000000
2002-01-01	9262000000
2003-01-01	10931000000
2004-01-01	13392000000
2005-01-01	15520000000
2006-01-01	19856000000
2007-01-01	24156000000
2008-01-01	30543000000
2009-01-01	24191000000
2010-01-01	29620000000
2011-01-01	31894000000
2012-01-01	31931000000
2013-01-01	33188000000