Year Dollars 1992-01-01 5931385 1997-01-01 15537320 2002-01-01 26834101 2003-01-01 21854484 2004-01-01 27267957 2005-01-01 31849296 2006-01-01 27781722 2007-01-01 26978940 2008-01-01 37158224 2009-01-01 28549094 2010-01-01 31168372 2011-01-01 42398879 2012-01-01 47264596 2013-01-01 44433914 2014-01-01 48320454 2015-01-01 37864614 2016-01-01 34519875