Year	% of population
2006	6.22138889108261
2009	7.15987196323865
2011	5.6020704331788
2012	5.89741620135556
2015	6.91355619920468
2016	2.79736797712055
2017	2.80250585249336
2018	2.34982999691666
2019	2.26755249343202
2020	2.17993919074125