Year	% of population
2001	18.177270747206823
2002	18.501094728339606
2003	18.056247343746307
2004	16.606694796317367
2005	15.15787318058229
2006	14.12501052505539
2007	13.719995674671761
2008	13.70722296119891
2009	13.490106616135597
2010	13.15155111708301
2011	12.839738700496858
2012	12.837198397694259
2013	12.396796279495375
2014	12.15374078693589
2015	11.830119783902227
2016	11.933038038358744
2017	12.01928133961005
2018	12.289695275825098
2019	13.823797366025863
2020	15.747853604711617
2021	17.63042543586723