Year	US Dollars, Sum Over Component Sub-periods
1980-01-01	16281200000
1981-01-01	19853700000
1982-01-01	19403900000
1983-01-01	21789000000
1984-01-01	26211100000
1985-01-01	25169900000
1986-01-01	33414900000
1987-01-01	46391000000
1988-01-01	59622200000
1989-01-01	62293100000
1990-01-01	64167000000
1991-01-01	71341200000
1992-01-01	78044600000
1993-01-01	83410000000
1994-01-01	94703800000
1995-01-01	125519700000
1996-01-01	130639900000
1997-01-01	139051900000
1998-01-01	133895400000
1999-01-01	143819800000
2000-01-01	179386400000
2001-01-01	151868400000
2002-01-01	165120500000
2003-01-01	199822700000
2004-01-01	259917400000
2005-01-01	287764000000
2006-01-01	336228600000
2007-01-01	390747700000
2008-01-01	434801200000
2009-01-01	353713300000
2010-01-01	457508500000
2011-01-01	548682100000
2012-01-01	554868600000
2013-01-01	570038000000