Year Dollars 1992-01-01 2470582 1997-01-01 339054 2002-01-01 3197634 2005-01-01 3298395 2006-01-01 5677145 2007-01-01 11279514 2008-01-01 7629408 2009-01-01 8703958 2010-01-01 6753174 2011-01-01 4463414 2012-01-01 8453889 2013-01-01 7158149 2014-01-01 7164509 2015-01-01 9629435 2016-01-01 11466976