Year	%
1990	50.9569358705783
1991	51.425064888075724
1992	51.57445215744419
1993	52.20436819194904
1994	52.542764105359204
1995	52.95439437711033
1996	53.09302404524577
1997	53.18632154079759
1998	53.286433563169
1999	53.375329244973244
2000	53.546283264172494
2001	53.86210919987267
2002	53.91324113725769
2003	53.86507510025243
2004	53.84960188962332
2005	53.89879233771709
2006	53.89059656553167
2007	53.87479697351393
2008	53.873077894227755
2009	53.859275123586116
2010	53.973714279009435
2011	54.05899297663327
2012	54.26572665555933
2013	54.53757111607971
2014	54.93420145110124
2015	55.236756349368704
2016	55.515977563776254
2017	55.80202645989726
2018	56.03118199621331
2019	56.361345368876734
2020	56.56865608214461
2021	56.76744932116203
2022	57.041403500769405