Year	% of population
2001	24.626428764755772
2002	24.15799843673346
2003	23.43837616387116
2004	22.276020971061214
2005	21.193352937983903
2006	20.22110396625724
2007	19.59500919604794
2008	19.06467310859649
2009	18.090416772706252
2010	17.21990847974186
2011	16.47451554853028
2012	16.436127950722693
2013	16.148711179461674
2014	16.181099815191487
2015	16.43968343866138
2016	16.622257224887502
2017	16.701538757036158
2018	16.778925596687145
2019	17.56980037396888
2020	18.61658086358293
2021	19.537291431954877