Year	Percent
1992-01-01	18.10930
1993-01-01	15.45470
1994-01-01	15.52920
1995-01-01	21.09090
1996-01-01	25.52590
1997-01-01	23.29340
1998-01-01	24.05200
1999-01-01	47.53160
2000-01-01	56.01510
2001-01-01	52.96750
2002-01-01	54.14920
2003-01-01	40.31320
2004-01-01	32.02380
2005-01-01	33.40160
2006-01-01	78.04490
2007-01-01	71.71660
2008-01-01	47.97530
2009-01-01	33.96400
2010-01-01	32.37620
2011-01-01	18.41590
2012-01-01	9.23917
2013-01-01	8.65343
2014-01-01	13.23380
2015-01-01	15.36060
2016-01-01	12.74200
2017-01-01	12.39930