Year Dollars 1992-01-01 2188718 1997-01-01 11848387 2002-01-01 6282397 2003-01-01 7067100 2004-01-01 6283795 2005-01-01 7844010 2006-01-01 8015109 2007-01-01 10060697 2008-01-01 16187965 2009-01-01 11129201 2010-01-01 15401973 2011-01-01 15813249 2012-01-01 15678752 2013-01-01 19261267 2014-01-01 31133873 2015-01-01 41359751 2016-01-01 34511433