Year	Percent
1995-01-01	1.1390500000000000
1996-01-01	1.3518100000000000
1997-01-01	3.3192100000000000
1998-01-01	3.8888599999999998
1999-01-01	1.2717100000000001
2000-01-01	1.1400000000000000
2001-01-01	2.0069300000000000
2002-01-01	2.5157300000000000
2003-01-01	3.5918400000000004
2004-01-01	4.2356800000000000
2005-01-01	4.4918700000000000
2006-01-01	5.9120099999999995
2007-01-01	7.9478300000000010
2008-01-01	9.9139900000000000
2009-01-01	16.9704000000000000
2010-01-01	18.6506000000000000
2011-01-01	18.5313000000000000
2012-01-01	20.9566000000000000
2013-01-01	22.5006000000000000
2014-01-01	22.8972000000000000
2015-01-01	25.0094000000000000
2016-01-01	22.4375000000000000