Year Dollars 1997-01-01 552887 2002-01-01 2825213 2003-01-01 918562 2004-01-01 1636474 2005-01-01 1758137 2006-01-01 2853820 2007-01-01 2369290 2008-01-01 4941543 2009-01-01 2860045 2010-01-01 6007749 2011-01-01 2469232 2012-01-01 8017033 2013-01-01 4480904 2014-01-01 6450652 2015-01-01 5106290 2016-01-01 7493593