Year	US Dollars, Sum Over Component Sub-periods
1994-01-01	9215000000
1995-01-01	285000000
1996-01-01	5833000000
1997-01-01	91000000
1998-01-01	117000000
1999-01-01	95000000
2000-01-01	110000000
2001-01-01	113000000
2002-01-01	46000000
2003-01-01	60000000
2004-01-01	1326000000
2005-01-01	1185000000
2006-01-01	2573000000
2007-01-01	5410000000
2008-01-01	7089000000
2009-01-01	7438000000
2010-01-01	9216000000
2011-01-01	11796000000
2012-01-01	11618000000
2013-01-01	12636000000