Year Dollars 1992-01-01 5429233 1997-01-01 558802 2002-01-01 10008015 2004-01-01 6711398 2005-01-01 15354366 2006-01-01 20552358 2007-01-01 3510575 2008-01-01 25146545 2009-01-01 4019867 2010-01-01 2436375 2011-01-01 3811691 2012-01-01 4474748 2013-01-01 3773788 2014-01-01 6469289 2015-01-01 5638448 2016-01-01 3006638