Year Dollars 1992-01-01 2477081 1997-01-01 4448563 2002-01-01 3222909 2003-01-01 3403987 2004-01-01 24456378 2005-01-01 17169219 2006-01-01 8253024 2007-01-01 5638030 2008-01-01 10471175 2009-01-01 5544644 2010-01-01 8449473 2011-01-01 10072407 2012-01-01 17952125 2013-01-01 20396685 2014-01-01 22786693 2015-01-01 43263607 2016-01-01 17417858