Year	Percent
1996-01-01	17.083200000000000
1997-01-01	16.701600000000000
1998-01-01	10.673200000000000
1999-01-01	10.512100000000000
2000-01-01	10.828000000000000
2001-01-01	5.683750000000000
2002-01-01	6.790070000000000
2003-01-01	10.399000000000001
2004-01-01	12.426600000000000
2005-01-01	15.707000000000000
2006-01-01	19.728400000000000
2007-01-01	23.293300000000000
2008-01-01	25.842900000000000
2009-01-01	23.978000000000000
2010-01-01	22.315000000000000
2011-01-01	20.931400000000000
2012-01-01	20.740800000000000
2013-01-01	21.350200000000000
2014-01-01	19.633600000000000
2015-01-01	19.151600000000000
2016-01-01	14.659500000000000