Year	US Dollars, Sum Over Component Sub-periods
1980-01-01	1383300000
1981-01-01	1779100000
1982-01-01	1731300000
1983-01-01	1698000000
1984-01-01	2519800000
1985-01-01	2293600000
1986-01-01	1961700000
1987-01-01	2415900000
1988-01-01	3064400000
1989-01-01	3181000000
1990-01-01	3346600000
1991-01-01	3599600000
1992-01-01	2876000000
1993-01-01	2790000000
1994-01-01	3366500000
1995-01-01	3723800000
1996-01-01	4043200000
1997-01-01	4442600000
1998-01-01	4921600000
1999-01-01	4487200000
2000-01-01	5989900000
2001-01-01	5341700000
2002-01-01	4070800000
2003-01-01	3905800000
2004-01-01	5757000000
2005-01-01	4818500000
2006-01-01	5578100000
2007-01-01	7664200000
2008-01-01	8529600000
2009-01-01	6798200000
2010-01-01	10794900000
2011-01-01	10645300000
2012-01-01	13172800000
2013-01-01	11447300000
2014-01-01	11719700000
2015-01-01	7915400000
2016-01-01	6798300000