Year Dollars 1992-01-01 538309 1997-01-01 761888 2002-01-01 927555 2003-01-01 2740877 2004-01-01 1823791 2005-01-01 1982880 2006-01-01 6454874 2007-01-01 5994185 2008-01-01 7820725 2009-01-01 3892221 2010-01-01 5730088 2011-01-01 10185787 2012-01-01 10342349 2013-01-01 13880238 2014-01-01 15297872 2015-01-01 11758098 2016-01-01 11872716