Year	Percent
1996-01-01	92.2408
1997-01-01	70.5644
1998-01-01	66.7428
1999-01-01	70.1627
2000-01-01	76.7705
2001-01-01	86.0408
2002-01-01	86.3688
2003-01-01	87.7979
2004-01-01	84.7065
2005-01-01	80.6032
2006-01-01	81.0513
2007-01-01	87.7852
2008-01-01	85.1879
2009-01-01	90.3609
2010-01-01	98.8264
2011-01-01	99.0153
2012-01-01	98.9591