Year	%
1990	54.9487192441772
1991	55.6673385978215
1992	56.2823464248005
1993	56.8284827254163
1994	57.2938706356348
1995	57.7295543683522
1996	58.1417072120735
1997	58.4837753729064
1998	58.6824692185275
1999	58.8388808077351
2000	58.9462505266114
2001	58.9978579756514
2002	58.9992921277151
2003	58.970589648248
2004	58.9023561730158
2005	58.8348912151478
2006	58.7792591393716
2007	58.7639404254449
2008	58.7740632342636
2009	58.7963632606674
2010	58.8499979264297
2011	59.0798629141136
2012	59.6154046697882
2013	60.2357444034363
2014	60.8415852081169
2015	61.4228800308437
2016	61.9457463121747
2017	62.4598650153987
2018	63.024727489591
2019	63.5734644833175
2020	64.0054173015067
2021	64.4042318160595
2022	64.7308537441184