Year	Percent
1996-01-01	36.9439
1997-01-01	34.3381
1998-01-01	35.8276
1999-01-01	41.2109
2000-01-01	39.8570
2001-01-01	36.3628
2002-01-01	38.3475
2003-01-01	39.4385
2004-01-01	41.8825
2005-01-01	42.5501
2006-01-01	57.8331
2007-01-01	57.2729
2008-01-01	61.0050
2009-01-01	45.2261
2010-01-01	39.5189
2011-01-01	39.6527
2012-01-01	39.4617
2013-01-01	47.9274
2014-01-01	49.3432