Year	Percent
1996-01-01	36.8596
1997-01-01	39.5386
1998-01-01	22.3792
1999-01-01	41.9355
2000-01-01	73.1373
2001-01-01	47.4093
2002-01-01	50.4780
2003-01-01	44.8889
2004-01-01	49.7512
2005-01-01	39.2489
2006-01-01	43.6105
2007-01-01	30.1023
2008-01-01	28.0865
2009-01-01	26.4945
2010-01-01	28.2449
2011-01-01	24.3621
2012-01-01	20.7254
2013-01-01	20.0629
2014-01-01	21.3259
2015-01-01	26.7740
2016-01-01	52.6161