Year	Percent
1995-01-01	5.32085310126004
1996-01-01	5.38175832447116
1997-01-01	6.32386051720677
1998-01-01	7.00538742749201
1999-01-01	7.49104186294489
2000-01-01	7.32771681914701
2001-01-01	7.77400550815698
2002-01-01	8.65323516330264
2003-01-01	8.94288112056699
2004-01-01	8.81533810955453
2005-01-01	7.63609593474162
2006-01-01	6.90835023895984
2007-01-01	6.02764447663859
2008-01-01	5.17066922467311
2009-01-01	6.58926404876806
2010-01-01	5.70402651909907
2011-01-01	4.85485911566781
2012-01-01	5.81189764058417
2013-01-01	5.35944193637512
2014-01-01	4.97871222577216
2015-01-01	4.47639541011086
2016-01-01	4.07849255774928
2017-01-01	3.64492991125722