Year	US Dollars, Sum Over Component Sub-periods
1980-01-01	14448530000.000000
1981-01-01	12628920000.000000
1982-01-01	9457850000.000000
1983-01-01	6388410000.000000
1984-01-01	5519900000.000000
1985-01-01	3805990000.000000
1986-01-01	3999320000.000000
1987-01-01	5714450000.000000
1988-01-01	6095470000.000000
1989-01-01	4652420000.000000
1990-01-01	5930900000.000000
1991-01-01	6296040000.000000
1992-01-01	6839390000.000000
1993-01-01	5990310000.000000
1994-01-01	6346800000.000000
1995-01-01	5860690000.000000
1996-01-01	5703260000.000000
1997-01-01	7138420000.000000
1998-01-01	7021090000.000000
1999-01-01	7630000000.000000
2000-01-01	8150880000.000000
2001-01-01	8200559999.999999
2002-01-01	10140750000.000000
2003-01-01	12999180000.000000
2004-01-01	19216710000.000000
2005-01-01	19128670000.000000
2006-01-01	19250850000.000000
2007-01-01	22713390000.000000
2008-01-01	25052690000.000000
2009-01-01	17560560000.000000
2010-01-01	17546670000.000000
2011-01-01	20342520000.000000
2012-01-01	19458590000.000000
2013-01-01	22539300000.000000