Year Dollars 1997-01-01 13201 2002-01-01 45955 2006-01-01 124972 2008-01-01 909811 2009-01-01 471496 2010-01-01 147967 2011-01-01 222406 2012-01-01 189466 2013-01-01 105941 2014-01-01 163220 2015-01-01 151413 2016-01-01 253725