Year Dollars 1992-01-01 476524 1997-01-01 2954234 2002-01-01 5830110 2003-01-01 3210893 2004-01-01 7897982 2005-01-01 13063609 2006-01-01 17863084 2007-01-01 10949014 2008-01-01 17001315 2009-01-01 14160127 2010-01-01 3498456 2011-01-01 7428852 2012-01-01 17069469 2013-01-01 16718749 2014-01-01 3233021 2015-01-01 4767292 2016-01-01 19018530