Year Dollars 1997-01-01 5381449 2002-01-01 1771508 2003-01-01 5061432 2004-01-01 14489814 2005-01-01 18005282 2006-01-01 15015110 2007-01-01 9482037 2008-01-01 6183556 2009-01-01 2303756 2010-01-01 2278663 2011-01-01 2180278 2012-01-01 4526608 2013-01-01 2218926 2014-01-01 2645675 2015-01-01 2643077 2016-01-01 1769615