Year Dollars 1992-01-01 3737862 1997-01-01 8228398 2002-01-01 6808296 2003-01-01 4329132 2004-01-01 4147548 2005-01-01 11210417 2006-01-01 10962147 2007-01-01 10611217 2008-01-01 9189412 2009-01-01 12119582 2010-01-01 15572253 2011-01-01 18663872 2012-01-01 20266945 2013-01-01 68147786 2014-01-01 21819022 2015-01-01 98506330 2016-01-01 20225050