Annual Percent
1979-01-01 48.1945068488112
1980-01-01 47.0279458104224
1981-01-01 46.3663606591784
1982-01-01 45.9998127370744
1983-01-01 46.1077114202447
1984-01-01 44.7010986395803
1985-01-01 42.7454395429805
1986-01-01 39.5787952948383
1987-01-01 38.4440392098136
1988-01-01 36.6661632094099
1989-01-01 34.7751753722709
1990-01-01 33.2161843670399
1991-01-01 32.9425745500329
1992-01-01 32.7168047532754
1993-01-01 32.8666780934445
1994-01-01 32.2618086205442
1995-01-01 30.9904518909420
1996-01-01 30.9701799335047
1997-01-01 30.6830597474520
1998-01-01 30.6842664290581
1999-01-01 30.6215692130658
2000-01-01 29.5399658437096
2001-01-01 28.8828389622338
2002-01-01 28.4378459624080
2003-01-01 27.5083355695207
2004-01-01 28.1415473749903
2005-01-01 26.3237591225281
2006-01-01 25.7883503875627
2007-01-01 25.2152518724758
2008-01-01 24.6216256831016
2009-01-01 24.4505074569404
2010-01-01 24.8550775363917
2011-01-01 24.3645754340166
2012-01-01 24.4347985656958
2013-01-01 24.1975940575016
2014-01-01 24.1300940338136
2015-01-01 23.4234813911029
2016-01-01 23.1252351102793
2017-01-01 22.3136870662179