Year	Percent
1999-01-01	11.6542
2000-01-01	15.8526
2001-01-01	14.4683
2002-01-01	11.5719
2003-01-01	14.3321
2004-01-01	17.6863
2005-01-01	18.5644
2006-01-01	22.2303
2007-01-01	26.0552
2008-01-01	12.9291
2009-01-01	20.8668
2010-01-01	28.8121
2011-01-01	22.8473
2012-01-01	32.7984
2013-01-01	42.6779
2014-01-01	46.8894
2015-01-01	67.2270
2016-01-01	56.6732