Year	%
1990	61.6349420075879
1991	62.3651739375796
1992	62.9298838449084
1993	63.3649020756004
1994	63.6801726392203
1995	63.9135654456331
1996	64.1039136050873
1997	64.2642253209234
1998	64.4048377213387
1999	64.5369952555553
2000	64.6531044628519
2001	64.7479022414065
2002	64.8186726142828
2003	64.8645977954219
2004	64.8462868326169
2005	64.734425437158
2006	64.5358377661317
2007	64.2725385605802
2008	63.9870871078251
2009	63.723691966298
2010	63.5139055900515
2011	63.4544216104303
2012	63.6313691578276
2013	63.894930143115
2014	64.2044009440399
2015	64.4823785907664
2016	64.7073110912443
2017	64.9354004965024
2018	65.1542944261134
2019	65.3744071637659
2020	65.6163973483773
2021	65.8407565972771
2022	66.0227572018032