Year Dollars 1997-01-01 194179 2002-01-01 251826 2003-01-01 1249019 2004-01-01 500095 2005-01-01 730621 2006-01-01 1397239 2007-01-01 1217735 2008-01-01 1506987 2009-01-01 1815024 2010-01-01 3288513 2011-01-01 9139645 2012-01-01 6209660 2013-01-01 6320650 2014-01-01 8556570 2016-01-01 15164852