Year Dollars 1997-01-01 1256983 2003-01-01 3511088 2004-01-01 1718075 2006-01-01 4814705 2007-01-01 5916468 2011-01-01 1470805 2012-01-01 988926 2013-01-01 1403348 2014-01-01 758523 2015-01-01 1016152 2016-01-01 886710