Year	Percent
1991-01-01	10.93500041961670
1992-01-01	10.24800014495850
1993-01-01	11.12800025939940
1994-01-01	5.83500003814697
1995-01-01	6.05900001525879
1996-01-01	8.44799995422363
1997-01-01	3.43400001525879
1998-01-01	5.42600011825562
1999-01-01	7.48400020599365
2000-01-01	8.44900035858154
2001-01-01	10.15900039672850
2002-01-01	10.16800022125240
2003-01-01	9.14200019836426
2004-01-01	8.11600017547607
2005-01-01	9.06700038909912
2006-01-01	8.37100028991699
2007-01-01	10.89099979400630
2008-01-01	5.59899997711182
2009-01-01	5.01800012588501
2010-01-01	5.08799982070923
2011-01-01	5.15399980545044
2012-01-01	3.30399990081787
2013-01-01	5.32600021362305
2014-01-01	4.63399982452393
2015-01-01	6.81599998474121
2016-01-01	6.32299995422363
2017-01-01	6.50099992752075