Year Dollars 1992-01-01 5899488 1997-01-01 6805618 2002-01-01 3707975 2003-01-01 6046953 2004-01-01 3981572 2005-01-01 9025896 2006-01-01 7233077 2007-01-01 10894225 2008-01-01 9464860 2009-01-01 10160276 2010-01-01 14878923 2011-01-01 29890707 2012-01-01 35162943 2013-01-01 17203809 2014-01-01 17674614 2015-01-01 26479254 2016-01-01 19137590