Year	% of population
2001	25.742717730660623
2002	25.21335806437073
2003	24.645642939699993
2004	23.662367671097826
2005	22.655146643143016
2006	21.91624953357012
2007	21.552362790165834
2008	21.169164457183548
2009	19.69417858505423
2010	18.344682242691718
2011	17.15462046426041
2012	17.06228244841189
2013	16.87673487012937
2014	17.22529322834106
2015	17.808711739751484
2016	18.234791237655422
2017	18.515179929408614
2018	18.70166596105537
2019	19.596530715522142
2020	20.646893124924055
2021	21.601365437093275