Year Dollars 1992-01-01 1569865 1997-01-01 8669717 2002-01-01 16773486 2003-01-01 6740341 2004-01-01 12700677 2005-01-01 23004270 2006-01-01 8277405 2007-01-01 22060476 2008-01-01 10873123 2009-01-01 18597191 2010-01-01 30111716 2011-01-01 22497239 2012-01-01 12681344 2013-01-01 26612099 2014-01-01 15841489 2015-01-01 36463079 2016-01-01 13487038