Year Dollars 1997-01-01 477771 2002-01-01 266279 2003-01-01 310048 2004-01-01 770656 2005-01-01 6263441 2006-01-01 3328972 2007-01-01 4710380 2013-01-01 4334875 2015-01-01 3305741 2016-01-01 4109932