Year	US Dollars, Sum Over Component Sub-periods
1992-01-01	11311540000
1993-01-01	7545440000
1994-01-01	10045890000
1995-01-01	5065730000
1996-01-01	4572110000
1997-01-01	3955320000
1998-01-01	5191330000
1999-01-01	6107210000
2000-01-01	6513710000
2001-01-01	6348560000
2002-01-01	7269110000
2003-01-01	8879720000
2004-01-01	10015380000
2005-01-01	11665140000
2006-01-01	12197860000
2007-01-01	15281620000
2008-01-01	20829490000
2009-01-01	17614600000
2010-01-01	17449330000
2011-01-01	18958260000
2012-01-01	18118110000
2013-01-01	20452740000