Year Dollars 1997-01-01 14417 2006-01-01 214173 2008-01-01 73313 2009-01-01 114654 2010-01-01 230890 2011-01-01 404267 2012-01-01 675411 2013-01-01 389240 2014-01-01 301367 2016-01-01 102049