Year	US Dollars, Sum Over Component Sub-periods
1980-01-01	7820700000
1981-01-01	11893800000
1982-01-01	13992600000
1983-01-01	10821300000
1984-01-01	12596300000
1985-01-01	11290200000
1986-01-01	9481300000
1987-01-01	9217100000
1988-01-01	10310400000
1989-01-01	11483200000
1990-01-01	11972500000
1991-01-01	12207600000
1992-01-01	12470800000
1993-01-01	14219100000
1994-01-01	16378300000
1995-01-01	16402500000
1996-01-01	17506900000
1997-01-01	16536000000
1998-01-01	17733000000
1999-01-01	16437200000
2000-01-01	19781100000
2001-01-01	18306800000
2002-01-01	16297000000
2003-01-01	16150700000
2004-01-01	15800500000
2005-01-01	21278400000
2006-01-01	24996700000
2007-01-01	30606800000
2008-01-01	28785600000
2009-01-01	21962000000
2010-01-01	24097900000
2011-01-01	31631000000
2012-01-01	39041200000
2013-01-01	52181200000
2014-01-01	45596300000
2015-01-01	41869000000
2016-01-01	40395800000