Year	Percent
1996-01-01	78.1748
1997-01-01	77.3849
1998-01-01	41.7628
1999-01-01	53.1868
2000-01-01	39.8773
2001-01-01	41.3163
2002-01-01	41.5916
2003-01-01	38.7553
2004-01-01	32.7805
2005-01-01	30.2995
2006-01-01	28.6780
2007-01-01	28.4117
2008-01-01	24.0688
2009-01-01	24.3409
2010-01-01	25.6868
2011-01-01	26.5812
2012-01-01	30.9234
2013-01-01	32.4600
2014-01-01	33.4714