Year Dollars 1997-01-01 4354005 2005-01-01 3149072 2007-01-01 3272034 2008-01-01 5064182 2009-01-01 3295698 2010-01-01 2242406 2012-01-01 530985 2013-01-01 1502502 2014-01-01 2214628 2015-01-01 613322 2016-01-01 604148