Year	Percent
1992-01-01	5.16688509048323
1993-01-01	5.82336281139818
1994-01-01	7.94824952831601
1995-01-01	9.19732942127481
1996-01-01	9.29492039423806
1997-01-01	11.45302314085330
1998-01-01	12.95474434304290
1999-01-01	12.89582541742240
2000-01-01	10.36739804775320
2001-01-01	8.59723928597239
2002-01-01	7.59846587129736
2003-01-01	8.00727934485896
2004-01-01	7.54117367678489
2005-01-01	7.01865986121713
2006-01-01	6.81965474000308
2007-01-01	5.76293827543634
2008-01-01	6.06790061022892
2009-01-01	7.87487459854703
2010-01-01	6.94890887143806
2011-01-01	6.03924992805477
2012-01-01	5.08907094545857
2013-01-01	5.15050483498041
2014-01-01	4.81203081826574
2015-01-01	5.29614377299486
2016-01-01	5.31340658427168
2017-01-01	5.05377989131373