Year	Percent
1988-01-01	0.8892920000000000
1989-01-01	0.7494560000000000
1990-01-01	0.6242660000000000
1991-01-01	0.6062590000000000
1992-01-01	0.5485080000000000
1993-01-01	0.5005330000000000
1994-01-01	0.6076890000000000
1995-01-01	0.3757650000000000
1996-01-01	0.2591890000000000
1997-01-01	0.4768970000000000
1998-01-01	0.6656760000000000
1999-01-01	0.9138400000000000
2000-01-01	1.1138299999999999
2001-01-01	1.2927000000000000
2002-01-01	0.9300620000000000
2003-01-01	0.5519440000000000
2004-01-01	0.7069060000000000
2005-01-01	1.1824700000000001
2006-01-01	1.4960799999999999
2007-01-01	1.5269000000000000
2008-01-01	1.2908200000000000
2009-01-01	1.4942700000000000
2010-01-01	1.6000200000000000
2011-01-01	1.6369799999999999
2012-01-01	2.3060900000000000
2013-01-01	3.2157800000000000
2014-01-01	4.6052500000000000
2015-01-01	4.9148800000000000
2016-01-01	5.5481099999999990