Year	%
1997	16.61476868327403
1998	16.770462633451967
1999	17.974918718067805
2000	19.3723188078573
2001	19.176262178919405
2002	19.133489461358305
2003	20.690459528808024
2004	21.705243268776563
2005	22.144784172661872
2006	22.994173016584487
2007	24.524076147816366
2008	24.82094897045659
2009	25.396470851016307
2010	25.262452535179804
2011	25.97228430934287
2012	27.303220035778175
2013	29.759251003120813
2014	29.899665551839465
2015	29.692376281765497
2016	29.723090665475667
2017	30.792883812870635
2018	31.524604569420028
2019	32.9453107840984
2020	33.76509330406147
2021	34.48275862068966
2022	34.127893651157464
2023	34.53253895508706