Year	Percent
1991-01-01	3.2403299999999997
1992-01-01	2.3752000000000000
1993-01-01	14.4991000000000000
1994-01-01	13.9168000000000000
1995-01-01	12.5311000000000000
1996-01-01	10.9928000000000000
1997-01-01	11.2418000000000000
1998-01-01	11.0951000000000000
1999-01-01	10.3855000000000000
2000-01-01	10.5871000000000000
2001-01-01	10.8313000000000000
2002-01-01	10.7064000000000000
2003-01-01	10.3818000000000000
2004-01-01	11.5260000000000000
2005-01-01	11.4777000000000000
2006-01-01	10.6002000000000000
2007-01-01	7.0710300000000000
2008-01-01	6.2553199999999990
2009-01-01	10.7108000000000000
2010-01-01	10.8831000000000000
2011-01-01	13.2342000000000000
2012-01-01	15.7093000000000000
2013-01-01	19.7131000000000000
2014-01-01	21.0692000000000000
2015-01-01	19.9107000000000000
2016-01-01	16.9534000000000000