Year	%
1990	57.6576576576577
1991	58.3732057416268
1992	59.0094339622641
1993	59.5084087968952
1994	59.8717665266416
1995	60.183908045977
1996	60.3393886652888
1997	60.4058893752487
1998	60.4872107186358
1999	60.5299380591879
2000	60.5320485965647
2001	60.5318117401358
2002	60.5443590276335
2003	60.5590574568496
2004	60.5761527862339
2005	60.5893127842345
2006	60.5952492723688
2007	60.5736992425183
2008	60.5383099285538
2009	60.4933737336639
2010	60.4607170099161
2011	60.4523208803234
2012	60.6688091195731
2013	61.1370386084005
2014	61.668998236117
2015	62.2018460413684
2016	62.7444997101096
2017	63.3193650016823
2018	64.090518300172
2019	64.9379446275138
2020	65.5652227570036
2021	65.9726316442734
2022	66.2877608221738