Year	%
1997	15.51945668135096
1998	15.602382043060016
1999	16.80295950155763
2000	17.695937628231434
2001	17.61721319176923
2002	18.22945910537151
2003	18.70299027701339
2004	19.36395115728084
2005	19.76982781693282
2006	20.233220580380987
2007	21.140880056777863
2008	21.34881247784474
2009	21.816570669029684
2010	21.895482728077944
2011	22.424349986689144
2012	22.955005723342428
2013	24.31862141726745
2014	24.71346704871059
2015	25.310350986871494
2016	25.318826362258097
2017	26.737486496218942
2018	27.351034544001422
2019	28.450954283177985
2020	29.403926445767073
2021	30.0194586944985
2022	30.06411993136458
2023	30.25414563806777