Year	%
1990	23.7012987012987
1991	23.7960339943343
1992	23.989898989899
1993	24.0909090909091
1994	24.2236024844721
1995	24.3346007604563
1996	24.3986254295533
1997	24.5398773006135
1998	24.7252747252747
1999	24.8148148148148
2000	24.804469273743
2001	24.9746192893401
2002	25.0231696014829
2003	25.0424448217317
2004	25.1366120218579
2005	25.2699784017279
2006	25.3324468085106
2007	25.4153846153846
2008	25.4566210045662
2009	25.5702917771883
2010	25.6549678695007
2011	25.7024412713035
2012	25.7745266781411
2013	25.8467741935484
2014	25.938566552901
2015	26.0293591120659
2016	26.0677966101695
2017	26.1290322580645
2018	26.2022194821208
2019	26.2333825701625
2020	26.2858766695084
2021	26.3519077683228
2022	26.4110756123536