Year	Percent
1993-01-01	35.5589
1994-01-01	38.2897
1995-01-01	35.1485
1996-01-01	38.2135
1997-01-01	33.4136
1998-01-01	44.8969
1999-01-01	43.4499
2000-01-01	27.6057
2001-01-01	30.3913
2002-01-01	33.0352
2003-01-01	29.1806
2004-01-01	20.4188
2005-01-01	14.4075
2006-01-01	11.8279
2007-01-01	13.9836
2008-01-01	15.6233
2009-01-01	28.7857
2010-01-01	31.1252
2011-01-01	41.1195
2012-01-01	48.5335
2013-01-01	50.3088
2014-01-01	44.3853
2015-01-01	58.8480
2016-01-01	74.6786