Year	US Dollars, Sum Over Component Sub-periods
1980-01-01	2721000000
1981-01-01	2803000000
1982-01-01	2641000000
1983-01-01	2748000000
1984-01-01	2817000000
1985-01-01	3152000000
1986-01-01	3122000000
1987-01-01	3798000000
1988-01-01	4124000000
1989-01-01	4348000000
1990-01-01	4569000000
1991-01-01	4671000000
1992-01-01	5811000000
1993-01-01	5967000000
1994-01-01	6579000000
1995-01-01	8040000000
1996-01-01	8492000000
1997-01-01	9420000000
1998-01-01	10378000000
1999-01-01	12801000000
2000-01-01	16274000000
2001-01-01	13018000000
2002-01-01	12144000000
2003-01-01	13580000000
2004-01-01	15945000000
2005-01-01	17486000000
2006-01-01	19061000000
2007-01-01	21406000000
2008-01-01	25035000000
2009-01-01	22537000000
2010-01-01	25373000000
2011-01-01	27386000000
2012-01-01	31181000000
2013-01-01	33735000000
2014-01-01	34373000000