Year	%
1998	17.170785687938057
1999	18.25047199496542
2000	16.921658986175117
2001	17.20372359470104
2002	17.874911158493255
2003	16.81230339042295
2004	16.749528544488278
2005	16.86808510638297
2006	17.248829672308236
2007	17.680806675938786
2008	17.97577854671279
2009	18.79621668099742
2010	18.10344827586206
2011	18.087484035759886
2012	18.42857142857142
2013	19.632678910702996
2014	19.282881692002658
2015	20.06417834825201
2016	20.208367785678874
2017	20.51112943116239
2018	21.0586505472962
2019	21.152944852366808
2020	21.901419684160143
2021	21.927221614868024
2022	22.479973297730297
2023	23.310023310023325