Year	%
1990	53.5442408307203
1991	54.3587002452299
1992	55.0237309464246
1993	55.6003770568962
1994	56.0780715579199
1995	56.540219953439
1996	56.9315560581105
1997	57.2704145078189
1998	57.5687886646606
1999	57.8455095861074
2000	58.1000866249304
2001	58.3356229054467
2002	58.5536889536831
2003	58.7534005958523
2004	58.9053723011234
2005	59.0317961212231
2006	59.1054488233663
2007	59.1565434237008
2008	59.1846195908437
2009	59.1925876286018
2010	59.3087267724775
2011	59.6382971764314
2012	60.1370673683489
2013	60.7627880158719
2014	61.3168095373581
2015	61.897948330317
2016	62.5197894289302
2017	63.0815514629461
2018	63.6032106789459
2019	64.0499027485295
2020	64.3677768472589
2021	64.6003104384944
2022	64.7749952952407