Year	Percent
1994-01-01	13.28754707591940
1995-01-01	12.55579651993330
1996-01-01	10.22840473716020
1997-01-01	11.08963589909920
1998-01-01	12.15590217153390
1999-01-01	16.29686682944550
2000-01-01	18.92591660433030
2001-01-01	19.80694380068650
2002-01-01	18.64465544218600
2003-01-01	17.39034868157940
2004-01-01	17.42096948447430
2005-01-01	15.46763359832590
2006-01-01	12.27206208085950
2007-01-01	9.90695675780142
2008-01-01	8.36529634292255
2009-01-01	11.38133561960300
2010-01-01	14.20548208505560
2011-01-01	13.61060919037800
2012-01-01	13.51830274179990
2013-01-01	13.97493883469700
2014-01-01	12.82724795025770
2015-01-01	10.32473389789140
2016-01-01	8.77327673567748
2017-01-01	7.89954085085897