Year	Percent
1995-01-01	4.8336200000000000
1996-01-01	3.7180100000000000
1997-01-01	3.3134500000000000
1998-01-01	3.9058699999999997
1999-01-01	5.1940599999999995
2000-01-01	6.4198200000000000
2001-01-01	7.0277600000000010
2002-01-01	7.3980900000000000
2003-01-01	7.7819600000000010
2004-01-01	8.4566800000000000
2005-01-01	11.3221000000000000
2006-01-01	15.9325000000000000
2007-01-01	21.7942000000000000
2008-01-01	29.6485000000000000
2009-01-01	32.2327000000000000
2010-01-01	29.0761000000000000
2011-01-01	30.2839000000000000
2012-01-01	32.4834000000000000
2013-01-01	36.3547000000000000
2014-01-01	40.9212000000000000
2015-01-01	45.8767000000000000
2016-01-01	51.4479000000000000