Year	%
1990	53.10299101303168
1991	53.401921033037276
1992	53.73167490576228
1993	54.60434995050881
1994	54.43021140550313
1995	54.63563502811712
1996	54.5205724755262
1997	54.46118698156111
1998	54.478402285436324
1999	54.35969642244901
2000	54.41393891967288
2001	54.30713106790248
2002	54.10788377469983
2003	54.02962569896531
2004	54.08683266532502
2005	54.06541310655171
2006	54.06565727447738
2007	54.103798671109416
2008	54.19119042781882
2009	54.27957124619174
2010	54.39372980907775
2011	54.565530181771116
2012	54.84846681490918
2013	55.09537166054744
2014	55.47848692358663
2015	55.79337511021106
2016	56.07998969154349
2017	56.367660829924475
2018	56.58968309286958
2019	56.85673533855526
2020	57.09738665879763
2021	57.28833107698591
2022	57.51351555698593