Year	Percent
1993-01-01	41.3189
1994-01-01	29.8373
1995-01-01	15.1301
1996-01-01	11.1754
1997-01-01	11.7221
1998-01-01	13.8578
1999-01-01	16.5343
2000-01-01	19.6446
2001-01-01	25.6080
2002-01-01	31.2587
2003-01-01	37.3889
2004-01-01	45.3791
2005-01-01	55.4232
2006-01-01	68.9366
2007-01-01	73.7234
2008-01-01	87.7572
2009-01-01	87.7572
2010-01-01	98.9229
2011-01-01	86.0524
2012-01-01	72.5524
2013-01-01	63.7080
2014-01-01	57.4324
2015-01-01	53.2921
2016-01-01	51.5574