Year	% of population
2006	6.80838642297221
2009	8.20065127183899
2011	6.50539978352218
2012	6.84820096582227
2015	8.49253492583429
2016	3.66989222156636
2017	3.23960639983025
2018	3.05004210377819
2019	2.78526066177385
2020	3.06559345974794