Year Dollars 2002-01-01 312264 2005-01-01 86588 2008-01-01 405703 2010-01-01 131389 2011-01-01 58757 2012-01-01 371277 2013-01-01 500081 2014-01-01 89968 2015-01-01 327525 2016-01-01 217221