Year	US Dollars, Sum Over Component Sub-periods
1984-01-01	2220000000
1985-01-01	2864000000
1986-01-01	2997000000
1987-01-01	3813000000
1988-01-01	5652000000
1989-01-01	6414000000
1990-01-01	8016000000
1991-01-01	8372000000
1992-01-01	9564000000
1993-01-01	10919000000
1994-01-01	11076000000
1995-01-01	14939000000
1996-01-01	13057000000
1997-01-01	19248000000
1998-01-01	23183000000
1999-01-01	16370000000
2000-01-01	19463000000
2001-01-01	15203000000
2002-01-01	14031000000
2003-01-01	18047000000
2004-01-01	23364000000
2005-01-01	27958000000
2006-01-01	26195000000
2007-01-01	29928000000
2008-01-01	37043000000
2009-01-01	35712000000
2010-01-01	36279000000
2011-01-01	40668000000
2012-01-01	43089000000
2013-01-01	46584000000