Year	US Dollars, Sum Over Component Sub-periods
1980-01-01	23982330000.000000
1981-01-01	26975760000.000000
1982-01-01	22305180000.000000
1983-01-01	18320160000.000000
1984-01-01	16980130000.000002
1985-01-01	14152770000.000000
1986-01-01	11365190000.000000
1987-01-01	12396860000.000000
1988-01-01	12248670000.000000
1989-01-01	11600560000.000000
1990-01-01	10905630000.000000
1991-01-01	10406050000.000000
1992-01-01	8397620000.000001
1993-01-01	6487150000.000000
1994-01-01	6298970000.000000
1995-01-01	6656730000.000000
1996-01-01	6571210000.000000
1997-01-01	7082240000.000000
1998-01-01	6846830000.000000
1999-01-01	8954240000.000000
2000-01-01	10379970000.000000
2001-01-01	10335550000.000000
2002-01-01	9832570000.000000
2003-01-01	12555200000.000000
2004-01-01	15720950000.000000
2005-01-01	17648970000.000000
2006-01-01	20276710000.000000
2007-01-01	23882060000.000000
2008-01-01	28966980000.000000
2009-01-01	21280760000.000000
2010-01-01	22623200000.000000
2011-01-01	28130920000.000000
2012-01-01	28303890000.000000
2013-01-01	29914740000.000000