Year Dollars 1992-01-01 1139435 1997-01-01 2451779 2002-01-01 4543058 2003-01-01 6559968 2004-01-01 8131395 2005-01-01 7936592 2006-01-01 6217619 2007-01-01 9158566 2008-01-01 6138564 2009-01-01 4188589 2010-01-01 3884075 2011-01-01 6284909 2012-01-01 7703323 2013-01-01 9993121 2014-01-01 3586462 2015-01-01 4723102 2016-01-01 7021523