Year	% of population
2007	4.50128634225176
2008	3.83018178841516
2009	2.83428730834401
2010	4.10868019742406
2011	4.60042593550091
2012	2.86970995706229
2013	3.77069433419598
2014	5.10834340448107
2015	4.85108382189035
2016	4.98492529137159
2017	3.27701499857928
2018	3.29788182212683
2019	4.09256086673262