Year Dollars 1992-01-01 14869699 1997-01-01 4788736 2002-01-01 8931318 2003-01-01 3832561 2004-01-01 4763059 2005-01-01 5941730 2006-01-01 6477527 2007-01-01 7961860 2008-01-01 11270780 2009-01-01 14444994 2010-01-01 8527725 2011-01-01 8719322 2012-01-01 10561384 2013-01-01 12829024 2014-01-01 24444598 2015-01-01 22194853 2016-01-01 24437518