Year	US Dollars, Sum Over Component Sub-periods
1981-01-01	16542000000
1982-01-01	17854000000
1983-01-01	17726000000
1984-01-01	15047000000
1985-01-01	12705000000
1986-01-01	11938000000
1987-01-01	12532000000
1988-01-01	13831000000
1989-01-01	16310000000
1990-01-01	21455000000
1991-01-01	24834000000
1992-01-01	26774000000
1993-01-01	28376000000
1994-01-01	32322000000
1995-01-01	40921000000
1996-01-01	44240000000
1997-01-01	46223000000
1998-01-01	31942150000
1999-01-01	30598450000
2000-01-01	40365400000
2001-01-01	34668480000
2002-01-01	35651860000
2003-01-01	39546190000
2004-01-01	50615400000
2005-01-01	69461700000
2006-01-01	73867800000
2007-01-01	85259700000
2008-01-01	116690000000
2009-01-01	88715000000
2010-01-01	127447000000
2011-01-01	166005000000
2012-01-01	179878000000
2013-01-01	177399000000