Year Dollars 1992-01-01 31864625 1997-01-01 166618025 2002-01-01 209039025 2003-01-01 202468991 2004-01-01 255146632 2005-01-01 244755105 2006-01-01 232119339 2007-01-01 327701511 2008-01-01 436964447 2009-01-01 342478635 2010-01-01 548031989 2011-01-01 591274516 2012-01-01 707906685 2013-01-01 643544957 2014-01-01 554824216 2015-01-01 441083204 2016-01-01 332958378