Year	% of population
2004	17.7635714544621
2005	18.5267709867245
2006	20.6444750875538
2007	18.5818792719988
2008	21.6764432029448
2009	3.57038239335918
2010	4.32108706839919
2011	3.36818541744221
2012	2.97828726294345
2013	2.62717629246823
2014	3.24500644774497
2015	2.58115375297568
2016	2.1125536224662
2017	2.18844109700702
2018	2.71978149523372
2019	2.06612101525573