Year	US Dollars, Sum Over Component Sub-periods
1980-01-01	8223200000.000001
1981-01-01	9562510000.000000
1982-01-01	8179760000.000000
1983-01-01	6159700000.000000
1984-01-01	5029920000.000000
1985-01-01	4541520000.000000
1986-01-01	3908920000.000000
1987-01-01	3763420000.000000
1988-01-01	4416450000.000000
1989-01-01	4606170000.000000
1990-01-01	5056560000.000000
1991-01-01	4815610000.000000
1992-01-01	5104050000.000000
1993-01-01	4474510000.000000
1994-01-01	4464700000.000000
1995-01-01	4914560000.000000
1996-01-01	4727700000.000000
1997-01-01	4038070000.000000
1998-01-01	4487810000.000000
1999-01-01	9659660000.000000
2000-01-01	11447430000.000000
2001-01-01	11569330000.000000
2002-01-01	9762760000.000000
2003-01-01	11187400000.000000
2004-01-01	14015570000.000000
2005-01-01	14750400000.000000
2006-01-01	16372150000.000000
2007-01-01	20174010000.000000
2008-01-01	24784030000.000000
2009-01-01	19945540000.000000
2010-01-01	20200090000.000000
2011-01-01	19464310000.000000
2012-01-01	15937970000.000000
2013-01-01	14576770000.000000