Year Dollars 1992-01-01 6325558 1997-01-01 10635972 2002-01-01 8423834 2003-01-01 6237046 2004-01-01 5948590 2005-01-01 4711736 2006-01-01 20318600 2007-01-01 10717227 2008-01-01 23624198 2009-01-01 13489210 2010-01-01 19751371 2011-01-01 48761557 2012-01-01 52953243 2013-01-01 34323984 2014-01-01 53571647 2015-01-01 54366683 2016-01-01 27569536