Year Dollars 1992-01-01 5106113 1997-01-01 3336345 2002-01-01 6049192 2003-01-01 11403146 2004-01-01 7571509 2005-01-01 10359107 2006-01-01 7927816 2007-01-01 13560700 2008-01-01 15771895 2009-01-01 14515235 2010-01-01 26936880 2011-01-01 13498216 2012-01-01 27101422 2013-01-01 15221930 2014-01-01 12951619 2015-01-01 28889755 2016-01-01 31105279