Year	%
1997	7.598006196955412
1998	7.659261077697313
2002	10.858799371904817
2003	11.246997160952171
2004	11.905492482356554
2005	14.309021113243768
2006	14.489152250788493
2007	15.60812800628252
2008	16.432676905681713
2009	16.84742647058824
2010	16.744016744016747
2011	18.191295282773
2012	18.96270895842263
2013	18.968642378104043
2014	19.18714555765596
2015	20.471195471195472
2016	20.620422940837653
2017	20.88842308932603
2018	20.668389032419377
2019	20.632644453816958
2020	21.87090575596123
2021	22.685104148433403
2022	23.16471877282688
2023	23.509872670234362