Year	Percent
1989-01-01	11.130100000000000
1990-01-01	7.208450000000000
1991-01-01	6.848420000000000
1992-01-01	6.507930000000000
1993-01-01	7.236070000000000
1994-01-01	9.536660000000001
1995-01-01	15.206400000000000
1996-01-01	1.574510000000000
1997-01-01	10.833800000000000
1998-01-01	7.293850000000000
1999-01-01	11.362900000000000
2000-01-01	9.203389999999999
2001-01-01	7.545990000000000
2002-01-01	5.227830000000000
2003-01-01	11.021900000000000
2004-01-01	12.148700000000000
2005-01-01	15.474200000000000
2006-01-01	17.395500000000000
2007-01-01	23.277600000000000
2008-01-01	16.450200000000000
2009-01-01	21.037400000000000
2010-01-01	19.414000000000000
2011-01-01	16.186100000000000
2012-01-01	15.963100000000000
2013-01-01	14.390000000000000
2014-01-01	11.643400000000000
2015-01-01	9.946670000000000
2016-01-01	12.031300000000000
2017-01-01	14.729700000000000