Year	%
1998	16.046831955922887
1999	16.84560713745655
2000	16.357597564350957
2001	16.55372700871249
2002	17.216758722888326
2003	16.06960081883318
2004	16.625342555135088
2005	16.90890215416558
2006	17.28579175704989
2007	17.750230779374903
2008	17.95848660010509
2009	18.333987184516804
2010	17.769423558897238
2011	17.698677542948946
2012	17.856703944942847
2013	18.82742548755061
2014	18.595512739257206
2015	19.28737412858251
2016	19.42618806875634
2017	19.810606060606045
2018	20.235707121364097
2019	20.503814944895232
2020	21.33004926108374
2021	21.38448505385453
2022	21.927587965323813
2023	22.527332824815673