Year Dollars 1997-01-01 346419 2002-01-01 57502 2004-01-01 745451 2005-01-01 229856 2007-01-01 114513 2008-01-01 447262 2010-01-01 91173 2011-01-01 315906 2013-01-01 18890 2014-01-01 170280 2015-01-01 18087 2016-01-01 25183