Year Dollars 1992-01-01 743040 1997-01-01 2789106 2002-01-01 5165277 2003-01-01 4254897 2004-01-01 4698421 2005-01-01 6433184 2006-01-01 6119793 2007-01-01 5189216 2008-01-01 10536663 2009-01-01 10885590 2010-01-01 14243681 2011-01-01 18429743 2012-01-01 24499927 2013-01-01 19667125 2014-01-01 24154302 2015-01-01 25439870 2016-01-01 29607080