Year Dollars 1992-01-01 7237459 2002-01-01 2555979 2003-01-01 2559254 2004-01-01 3343276 2005-01-01 4887288 2006-01-01 5273508 2007-01-01 11009459 2008-01-01 11522069 2009-01-01 13249039 2010-01-01 15952591 2011-01-01 40866115 2012-01-01 18397874 2013-01-01 15322844 2014-01-01 13804996 2015-01-01 11415744 2016-01-01 10916833