Year Dollars 1992-01-01 1572457 1997-01-01 2265342 2002-01-01 3163601 2003-01-01 3216369 2004-01-01 4409215 2005-01-01 3551789 2006-01-01 4600043 2007-01-01 3837333 2008-01-01 5870315 2009-01-01 6866661 2010-01-01 5800192 2011-01-01 5041598 2012-01-01 4322020 2013-01-01 5875977 2014-01-01 3623465 2015-01-01 2868383 2016-01-01 3074153