Year	% of population
2000	14.648563488532762
2001	14.862693733584155
2002	15.294884226048435
2003	15.708044619610149
2004	16.052806745639824
2005	16.472593274152995
2006	16.891028492074327
2007	17.289624517654044
2008	17.70257371519124
2009	18.07408339616358
2010	18.430829984513267
2011	18.775963991111375
2012	19.10967361576268
2013	19.4399625248508
2014	19.863525949012715
2015	20.29786256835906
2016	20.759709138117184
2017	21.22502386548961
2018	21.689164356644067
2019	22.148857008031893
2020	22.617348044105853
2021	23.04329006255777
2022	23.26662946398079