Year	Percent
1996-01-01	13.513500000000000
1997-01-01	12.624600000000000
1998-01-01	20.472400000000000
1999-01-01	18.778300000000000
2000-01-01	10.261000000000000
2001-01-01	11.047300000000000
2002-01-01	19.838700000000000
2003-01-01	20.714300000000000
2004-01-01	19.427100000000000
2005-01-01	11.442300000000000
2006-01-01	24.957100000000000
2007-01-01	28.283400000000000
2008-01-01	20.321200000000000
2009-01-01	17.209300000000000
2010-01-01	26.720400000000000
2011-01-01	17.765400000000000
2012-01-01	17.269000000000002
2013-01-01	21.265900000000000
2014-01-01	26.205300000000000
2015-01-01	29.147300000000000
2016-01-01	22.918100000000000