Year	US Dollars, Sum Over Component Sub-periods
1980-01-01	9202000000
1981-01-01	9692000000
1982-01-01	8985000000
1983-01-01	8969000000
1984-01-01	8957000000
1985-01-01	9202000000
1986-01-01	9735000000
1987-01-01	13018000000
1988-01-01	13241000000
1989-01-01	13047000000
1990-01-01	15307000000
1991-01-01	17093000000
1992-01-01	18389000000
1993-01-01	20533000000
1994-01-01	22728000000
1995-01-01	26965000000
1996-01-01	28654000000
1997-01-01	28157000000
1998-01-01	26619000000
1999-01-01	30567000000
2000-01-01	34748000000
2001-01-01	31738000000
2002-01-01	31992000000
2003-01-01	33316000000
2004-01-01	39507000000
2005-01-01	43888000000
2006-01-01	47347000000
2007-01-01	55998000000
2008-01-01	64423000000
2009-01-01	46073000000
2010-01-01	58317000000
2011-01-01	72436000000
2012-01-01	71783000000
2013-01-01	71286000000
2014-01-01	71054000000