Year	% of population
2001	32.06051991465465
2002	31.24746911753715
2003	30.384194334885898
2004	29.387166395050684
2005	28.41158760307313
2006	27.49492878913153
2007	26.79798389862436
2008	26.059832183911556
2009	24.041848562619872
2010	22.258367005253703
2011	20.682374748853185
2012	20.552527512275876
2013	20.07340953882727
2014	20.386470362412176
2015	20.997739971595735
2016	21.312697729200515
2017	21.50047155719621
2018	21.654315967159672
2019	22.36184414140985
2020	23.181652290168888
2021	23.883057276315437