Year Dollars 1997-01-01 1123200 2002-01-01 788519 2003-01-01 1023093 2004-01-01 1332823 2005-01-01 1617574 2006-01-01 2154417 2007-01-01 4169464 2008-01-01 8086317 2009-01-01 2328114 2010-01-01 5294476 2011-01-01 7117604 2012-01-01 6795990 2013-01-01 7437157 2014-01-01 4867664 2015-01-01 7239269 2016-01-01 5158098