Year	US Dollars, Sum Over Component Sub-periods
1975-01-01	1053319999.9999999
1976-01-01	1162700000.0000000
1977-01-01	1310220000.0000000
1978-01-01	1544860000.0000000
1979-01-01	1925730000.0000000
1980-01-01	2471220000.0000000
1981-01-01	2523650000.0000000
1982-01-01	2448530000.0000000
1983-01-01	2440360000.0000000
1984-01-01	2607800000.0000000
1985-01-01	2817270000.0000000
1986-01-01	3316200000.0000000
1987-01-01	4494050000.0000000
1988-01-01	5496650000.0000000
1989-01-01	6190990000.0000000
1990-01-01	7728990000.0000000
1991-01-01	7668970000.0000000
1992-01-01	7545780000.0000000
1993-01-01	6629850000.0000000
1994-01-01	7273190000.0000000
1995-01-01	9572550000.0000000
1996-01-01	9234040000.0000000
1997-01-01	8908540000.0000000
1998-01-01	8639520000.0000000
1999-01-01	8547110000.0000010
2000-01-01	9407830000.0000000
2001-01-01	9235570000.0000000
2002-01-01	9867900000.0000000
2003-01-01	12166020000.0000000
2004-01-01	14591690000.0000000
2005-01-01	17737590000.0000000
2006-01-01	18630870000.0000000
2007-01-01	22423860000.0000000
2008-01-01	30726410000.0000000
2009-01-01	27199960000.0000000
2010-01-01	26622290000.0000000
2011-01-01	28910200000.0000000
2012-01-01	30562940000.0000000
2013-01-01	29806290000.0000000