Year	Percent
1988-01-01	0.8643020000000000
1989-01-01	0.8302250000000000
1990-01-01	0.2649870000000000
1991-01-01	0.2739590000000000
1992-01-01	0.2304890000000000
1993-01-01	0.2755640000000000
1994-01-01	1.9982900000000001
1995-01-01	3.9604800000000004
1996-01-01	3.8623900000000000
1997-01-01	5.7805700000000000
1998-01-01	5.9852700000000000
1999-01-01	6.6619100000000010
2000-01-01	6.9167100000000010
2001-01-01	7.9217500000000000
2002-01-01	11.0370000000000000
2003-01-01	11.3113000000000000
2004-01-01	12.8112000000000000
2005-01-01	11.3599000000000000
2006-01-01	10.1853000000000000
2007-01-01	9.4798200000000000
2008-01-01	8.5639000000000000
2009-01-01	8.5083000000000000
2010-01-01	7.6288399999999990
2011-01-01	5.6521600000000000
2012-01-01	6.8981400000000000
2013-01-01	6.3395400000000000
2014-01-01	6.5354800000000010
2015-01-01	7.1570199999999990
2016-01-01	8.5526699999999990