Year	Percent
1995-01-01	47.3043880775000
1996-01-01	47.1863244325000
1997-01-01	46.8735741725000
1998-01-01	46.2349913425000
1999-01-01	44.9864265225000
2000-01-01	43.8999539050000
2001-01-01	43.9866064575000
2002-01-01	43.7894970250000
2003-01-01	42.8376972300000
2004-01-01	42.3479103050000
2005-01-01	41.8733479900000
2006-01-01	41.3328154475000
2007-01-01	40.6036102975000
2008-01-01	40.4569792225000
2009-01-01	39.4752035650000
2010-01-01	39.0611316000000
2011-01-01	39.0712697025000
2012-01-01	32.9000000000000
2013-01-01	32.7166666666667
2014-01-01	31.6500000000000
2015-01-01	31.7250000000000
2016-01-01	31.3666666666667
2017-01-01	31.3250000000000