Year	% of population
2006	8.09237474415615
2007	8.08623571169757
2008	8.21736132785646
2009	8.39291048227242
2011	8.36406027895824
2012	8.54984296223906
2014	6.99440375569923
2015	6.73284514928059
2016	7.0471135591616
2017	6.5368478107033
2018	6.82360949378356
2019	7.90762314336712
2020	8.14275345885746