Year	Percent
1995-01-01	33.3100791698233
1996-01-01	33.5960246334709
1997-01-01	34.1295795994046
1998-01-01	36.1210585690858
1999-01-01	37.2618830808189
2000-01-01	39.0804571570995
2001-01-01	39.3435135839309
2002-01-01	41.3022705851014
2003-01-01	45.3674139579453
2004-01-01	46.1535347469480
2005-01-01	46.7723010121213
2006-01-01	48.6376151425869
2007-01-01	50.6763426934706
2008-01-01	51.6232015640692
2009-01-01	52.8529639897699
2010-01-01	53.2947195572037
2011-01-01	53.6788673805230
2012-01-01	54.8856745824915
2013-01-01	56.0323089086195
2014-01-01	55.9788670002405
2015-01-01	55.7819021773544
2016-01-01	56.9208924738344
2017-01-01	57.8666527655242