Year	US Dollars, Sum Over Component Sub-periods
1994-01-01	3109000000
1995-01-01	3084000000
1996-01-01	2602000000
1997-01-01	2596000000
1998-01-01	3404000000
1999-01-01	2847000000
2000-01-01	3709000000
2001-01-01	4015000000
2002-01-01	3837000000
2003-01-01	5745000000
2004-01-01	13742000000
2005-01-01	13841000000
2006-01-01	18788000000
2007-01-01	26527000000
2008-01-01	24008000000
2009-01-01	23176000000
2010-01-01	27109000000
2011-01-01	31957000000
2012-01-01	30970000000
2013-01-01	29716000000