Year Dollars 1992-01-01 4786276 1997-01-01 17363598 2002-01-01 34979187 2003-01-01 36944912 2004-01-01 23823808 2005-01-01 29638187 2006-01-01 57679297 2007-01-01 26463574 2008-01-01 38558573 2009-01-01 32957544 2010-01-01 28014836 2011-01-01 17617536 2012-01-01 27548255 2013-01-01 8505866 2014-01-01 9803150 2015-01-01 9154085 2016-01-01 17873285