Year	%
1998	17.596707818930064
1999	18.59778597785981
2000	17.322834645669296
2001	17.61500240423145
2002	18.213660245183892
2003	16.85944619698565
2004	17.190872648782015
2005	17.294730392156858
2006	17.657483486386333
2007	18.03278688524589
2008	18.296284781594892
2009	18.552875695732833
2010	17.938538450227902
2011	17.92684689894461
2012	18.236732345750024
2013	19.316877152698066
2014	19.063245823389035
2015	19.762665449566427
2016	19.868637110016444
2017	20.128033348220914
2018	20.626015059796256
2019	20.85637317453565
2020	21.543129605548323
2021	21.573352232459246
2022	22.049969897652012
2023	22.799639531390824