Year Dollars 1992-01-01 293593 1997-01-01 585703 2002-01-01 1141363 2003-01-01 547704 2004-01-01 1841656 2005-01-01 865479 2006-01-01 983759 2007-01-01 1842563 2008-01-01 6477769 2009-01-01 5186748 2010-01-01 5815953 2011-01-01 8053496 2012-01-01 15830046 2013-01-01 21283614 2014-01-01 3389249 2015-01-01 1385544 2016-01-01 866391