Year	% of population
2000	20.5919421717055
2001	20.6075711280017
2002	20.62319953674
2003	20.6388274346006
2004	20.654455969097
2005	21.8517553278988
2006	23.0494722107367
2007	24.3296017337058
2008	25.6176055136201
2009	26.9201924275394
2010	28.2380452033028
2011	29.5715496150198
2012	30.9207582195754
2013	32.2863939533756
2014	33.6685183809857
2015	35.0682362613739
2016	36.4856263269616
2017	36.5750321728239
2018	36.6726971878423
2019	36.7782607644713
2020	36.8920833728428