Year	US Dollars, Sum Over Component Sub-periods
1996-01-01	7901250000
1997-01-01	7666820000
1998-01-01	8764400000
1999-01-01	9217850000
2000-01-01	9059200000
2001-01-01	9405670000
2002-01-01	10289420000
2003-01-01	12357200000
2004-01-01	14680320000
2005-01-01	15196350000
2006-01-01	18398660000
2007-01-01	23218340000
2008-01-01	26119400000
2009-01-01	22670620000
2010-01-01	23292830000
2011-01-01	26642240000
2012-01-01	24547690000
2013-01-01	27299630000