Year Dollars 1992-01-01 37498544 1997-01-01 4747544 2002-01-01 12289479 2003-01-01 13538522 2004-01-01 21486280 2005-01-01 41386468 2006-01-01 147278640 2007-01-01 111821669 2008-01-01 133617261 2009-01-01 107475349 2010-01-01 65270613 2011-01-01 78985777 2012-01-01 284501582 2013-01-01 180476141 2014-01-01 123298147 2015-01-01 113050913 2016-01-01 169649959