Year	US Dollars, Sum Over Component Sub-periods
1980-01-01	22671730000.000000
1981-01-01	22191430000.000000
1982-01-01	17637610000.000000
1983-01-01	12548110000.000000
1984-01-01	10549820000.000000
1985-01-01	8347520000.000000
1986-01-01	7908240000.000000
1987-01-01	9477870000.000000
1988-01-01	10511920000.000000
1989-01-01	9258590000.000000
1990-01-01	10987460000.000000
1991-01-01	11111640000.000000
1992-01-01	11943450000.000000
1993-01-01	10464820000.000000
1994-01-01	10811500000.000000
1995-01-01	10775250000.000000
1996-01-01	10430960000.000000
1997-01-01	11201100000.000000
1998-01-01	11592230000.000000
1999-01-01	17313620000.000000
2000-01-01	19773560000.000000
2001-01-01	19766980000.000000
2002-01-01	19370190000.000000
2003-01-01	23915400000.000000
2004-01-01	33628750000.000000
2005-01-01	34122260000.000004
2006-01-01	35707250000.000000
2007-01-01	42097290000.000000
2008-01-01	49399500000.000000
2009-01-01	38094480000.000000
2010-01-01	38130510000.000000
2011-01-01	40011180000.000000
2012-01-01	34929190000.000000
2013-01-01	36205530000.000000