Year	Percent
1995-01-01	6.69155138212891
1996-01-01	6.21116945902804
1997-01-01	7.23325684650926
1998-01-01	7.50447858863419
1999-01-01	7.79428866919359
2000-01-01	7.62966811674204
2001-01-01	8.14737963255257
2002-01-01	8.77933017220304
2003-01-01	9.36969671145583
2004-01-01	9.63129817561378
2005-01-01	7.93737091935386
2006-01-01	7.23286376050733
2007-01-01	6.43466742243537
2008-01-01	5.41180749987514
2009-01-01	6.60978931837389
2010-01-01	5.52742377678772
2011-01-01	4.80376928621444
2012-01-01	5.79594498926314
2013-01-01	5.37013048347807
2014-01-01	4.89594320538461
2015-01-01	4.55304520524904
2016-01-01	4.15623899576215
2017-01-01	3.64908442875524