Year	% of population
2001	25.7398094787168
2002	25.21050456539401
2003	24.642964296066552
2004	23.65988496678012
2005	22.652834479202507
2006	21.914036142985438
2007	21.550260774292894
2008	21.167092933672677
2009	19.69239155776745
2010	18.343117525222183
2011	17.15336390525621
2012	17.06111801654297
2013	16.875653050184766
2014	17.224190881682617
2015	17.8075123661761
2016	18.233521765626307
2017	18.513866398564844
2018	18.70033093317082
2019	19.595139154086233
2020	20.645404216892107
2021	21.599889278959456