Year Dollars 1997-01-01 598605 2002-01-01 70615 2005-01-01 15229751 2006-01-01 2601163 2007-01-01 9677918 2009-01-01 751345 2010-01-01 10186774 2011-01-01 2068005 2012-01-01 1373322 2013-01-01 1396343 2014-01-01 1890815 2015-01-01 1822319 2016-01-01 23534634