Year	US Dollars, Sum Over Component Sub-periods
1996-01-01	3860468860855.94
1997-01-01	3975294958657.76
1998-01-01	3995104850974.75
1999-01-01	4117474340640.08
2000-01-01	4462288207849.24
2001-01-01	4293752785830.15
2002-01-01	4412472982325.24
2003-01-01	5077578572668.79
2004-01-01	6017856880273.34
2005-01-01	6564008163882.84
2006-01-01	7427166444638.63
2007-01-01	8480034124365.12
2008-01-01	9399720335862.53
2009-01-01	7330609216161.30
2010-01-01	8614982820791.21
2011-01-01	10069794965074.60
2012-01-01	9918913560725.50