Year Dollars 1997-01-01 154376 2002-01-01 37376 2003-01-01 87347 2004-01-01 501870 2005-01-01 43568 2006-01-01 199857 2007-01-01 57164 2008-01-01 468176 2009-01-01 121885 2010-01-01 639123 2011-01-01 784001 2012-01-01 1240268 2013-01-01 1204680 2014-01-01 558282 2015-01-01 631050 2016-01-01 260004