Year	Percent
1998-01-01	37.90000000000000
1999-01-01	36.80000000000000
2000-01-01	56.60000000000000
2001-01-01	77.50000000000000
2002-01-01	86.70000000000000
2003-01-01	98.10000000000000
2004-01-01	149.70000000000000
2005-01-01	163.70000000000000
2006-01-01	154.40000000000000
2007-01-01	133.80000000000000
2008-01-01	124.30000000000000
2009-01-01	140.10000000000000
2010-01-01	175.02700000000002
2011-01-01	181.99200000000002
2012-01-01	163.88900000000000
2013-01-01	160.69700000000000
2014-01-01	151.33000000000000
2015-01-01	155.46000000000000
2016-01-01	153.46200000000002