Year	Percent
1991-01-01	3.71700000762939
1992-01-01	4.13199996948242
1993-01-01	4.66200017929077
1994-01-01	4.94799995422363
1995-01-01	5.91200017929077
1996-01-01	6.83799982070923
1997-01-01	7.56099987030029
1998-01-01	7.48299980163574
1999-01-01	5.92600011825562
2000-01-01	6.29600000381470
2001-01-01	6.01100015640259
2002-01-01	7.14099979400635
2003-01-01	7.42899990081787
2004-01-01	12.05099964141850
2005-01-01	10.97099971771240
2006-01-01	9.73799991607666
2007-01-01	9.39099979400635
2008-01-01	8.46899986267090
2009-01-01	10.63199996948240
2010-01-01	9.43799972534180
2011-01-01	8.89799976348877
2012-01-01	9.38000011444092
2013-01-01	9.62899971008301
2014-01-01	10.25199985504150
2015-01-01	10.56499958038330
2016-01-01	11.24499988555910
2017-01-01	9.76799964904785