Year	Percent
1991-01-01	11.48700046539310
1992-01-01	12.29899978637700
1993-01-01	14.57100009918210
1994-01-01	10.17700004577640
1995-01-01	9.92300033569336
1996-01-01	10.59000015258790
1997-01-01	8.10299968719482
1998-01-01	7.17700004577637
1999-01-01	9.89999961853027
2000-01-01	6.73500013351440
2001-01-01	8.21700000762939
2002-01-01	7.03200006484985
2003-01-01	9.81799983978271
2004-01-01	7.77600002288818
2005-01-01	8.60499954223633
2006-01-01	7.68100023269653
2007-01-01	7.49200010299683
2008-01-01	7.97900009155273
2009-01-01	11.80900001525880
2010-01-01	13.94400024414060
2011-01-01	14.20699977874760
2012-01-01	14.10799980163570
2013-01-01	13.00199985504150
2014-01-01	12.56000041961670
2015-01-01	10.79800033569340
2016-01-01	11.93400001525880
2017-01-01	10.97099971771240