Year	% of population
2004	45.9379977641376
2005	47.0485568673263
2006	45.3718361297358
2007	47.4940953444643
2008	47.7926843260193
2009	44.5053887492949
2010	44.7911860243208
2011	43.2201621355094
2012	41.186154548227
2013	42.0681663488287
2014	43.4216502620056
2015	42.2313490793944
2016	41.2958925976251
2017	42.2284194667385
2018	43.3362443623183
2019	41.5244169055174