Year Dollars 1992-01-01 1603852 1997-01-01 2835827 2002-01-01 816700 2003-01-01 222065 2004-01-01 351482 2005-01-01 3270512 2006-01-01 580767 2007-01-01 1347998 2008-01-01 1541274 2010-01-01 4658540 2011-01-01 16271977 2012-01-01 18275431 2014-01-01 31845659 2015-01-01 7635867 2016-01-01 10802354