Year	% of population
2001	25.739809478716804
2002	25.210504565394018
2003	24.642964296066552
2004	23.659884966780123
2005	22.652834479202504
2006	21.91403614298544
2007	21.550260774292894
2008	21.167092933672677
2009	19.69239155776745
2010	18.34311752522218
2011	17.15336390525621
2012	17.061118016542967
2013	16.87565305018477
2014	17.22419088168262
2015	17.8075123661761
2016	18.233521765626303
2017	18.513866398564847
2018	18.70033093317082
2019	19.595139154086233
2020	20.645404216892103
2021	21.599889278959456