Year	Percent
1995-01-01	8.23488119264258
1996-01-01	8.19945490618304
1997-01-01	7.62842891776430
1998-01-01	6.65532279268199
1999-01-01	6.54434582259108
2000-01-01	5.24898219270904
2001-01-01	5.08435733243968
2002-01-01	4.97055980567060
2003-01-01	6.06315232478728
2004-01-01	5.99260459793865
2005-01-01	5.28085618196592
2006-01-01	4.53225598492376
2007-01-01	4.19553627610545
2008-01-01	3.73579133502826
2009-01-01	5.31644080641293
2010-01-01	6.46407779004461
2011-01-01	7.46538810861362
2012-01-01	7.54326687451486
2013-01-01	7.27577631000838
2014-01-01	6.82568809174902
2015-01-01	6.44602254979077
2016-01-01	6.63988273147600
2017-01-01	5.93528623890628