Year	Percent
1989-01-01	60.7652
1990-01-01	63.2063
1991-01-01	69.2875
1992-01-01	69.9035
1993-01-01	73.9357
1994-01-01	72.8715
1995-01-01	75.8864
1996-01-01	72.3813
1997-01-01	67.1289
1998-01-01	62.8793
1999-01-01	64.4697
2000-01-01	56.2998
2001-01-01	55.6039
2002-01-01	55.0717
2003-01-01	59.1286
2004-01-01	55.7214
2005-01-01	51.4625
2006-01-01	46.9343
2007-01-01	50.1789
2008-01-01	43.5600
2009-01-01	65.1396
2010-01-01	62.7078
2011-01-01	59.4202
2012-01-01	64.1305
2013-01-01	62.7730
2014-01-01	59.9224
2015-01-01	60.3619
2016-01-01	65.9529