Year Dollars 1992-01-01 42973371 2002-01-01 41770992 2005-01-01 165161161 2006-01-01 239219171 2007-01-01 196366201 2008-01-01 201817364 2009-01-01 122894704 2010-01-01 158516072 2011-01-01 245676382 2012-01-01 273003135 2013-01-01 286992400 2014-01-01 320348234 2015-01-01 278511234 2016-01-01 256583532