Year Dollars 1992-01-01 3680119 1997-01-01 1305935 2002-01-01 6883105 2003-01-01 5891412 2004-01-01 8931691 2005-01-01 5272354 2006-01-01 6087167 2007-01-01 7016831 2008-01-01 10362451 2009-01-01 16987167 2010-01-01 10836973 2011-01-01 13579510 2012-01-01 14883807 2013-01-01 13713359 2014-01-01 21799262 2015-01-01 22000292 2016-01-01 14117768