Year Dollars 1992-01-01 46951533 1997-01-01 102307319 2002-01-01 99113471 2003-01-01 92612064 2004-01-01 107163982 2005-01-01 129483213 2006-01-01 170612225 2007-01-01 172902822 2008-01-01 185064506 2009-01-01 195584760 2010-01-01 363457964 2011-01-01 412312920 2012-01-01 318915101 2013-01-01 188475491 2014-01-01 213180904 2015-01-01 180477675 2016-01-01 161555422