Year	%
1990	57.9222614840989
1991	58.5136814693523
1992	59.0075788611225
1993	59.4437971887246
1994	59.8184614539562
1995	60.1396812402466
1996	60.4252018132894
1997	60.6806197209389
1998	60.9154969276735
1999	61.125277527423
2000	61.3142153792999
2001	61.491182906423
2002	61.6478576995761
2003	61.7751365858334
2004	61.8642178459579
2005	61.9261524737966
2006	61.9454339806133
2007	61.910173273004
2008	61.8525488912528
2009	61.7924623014678
2010	61.733481223261
2011	61.8230421760212
2012	62.0982230033197
2013	62.4136494433841
2014	62.749770852429
2015	63.0489763340353
2016	63.2834880256675
2017	63.4713110091395
2018	63.6616661949241
2019	63.85651994136
2020	64.0683555688802
2021	64.2391964494277
2022	64.3349661768136