Year Dollars 1992-01-01 45159038 1997-01-01 4582913 2002-01-01 34603252 2004-01-01 36404131 2008-01-01 17045895 2009-01-01 2714967 2010-01-01 13208265 2011-01-01 5915784 2012-01-01 3547723 2013-01-01 6037338 2014-01-01 5242651 2015-01-01 8380093 2016-01-01 3879793