Year	US Dollars, Sum Over Component Sub-periods
1996-01-01	7901200000
1997-01-01	7666800000
1998-01-01	8764400000
1999-01-01	9217900000
2000-01-01	9059200000
2001-01-01	9405700000
2002-01-01	10289400000
2003-01-01	12357200000
2004-01-01	14680300000
2005-01-01	15196300000
2006-01-01	18398700000
2007-01-01	23218300000
2008-01-01	26119400000
2009-01-01	22670600000
2010-01-01	23292800000
2011-01-01	26642200000
2012-01-01	24547700000
2013-01-01	27299600000