Year Dollars 1992-01-01 428740 1997-01-01 1544550 2002-01-01 1034460 2003-01-01 972981 2004-01-01 1214666 2005-01-01 2768220 2006-01-01 10011481 2007-01-01 12738763 2008-01-01 8136793 2009-01-01 6642251 2010-01-01 9236553 2011-01-01 13120393 2012-01-01 15268826 2013-01-01 19863644 2014-01-01 25634910 2015-01-01 23648975 2016-01-01 16518910