Year	% of population
2004	24.0461454175781
2005	24.1353004873037
2006	25.7173344304826
2007	27.9262131685911
2008	28.1165076568359
2009	26.7082332300371
2010	28.4855813350725
2011	31.8071134731499
2012	31.9264873690021
2013	33.4246807968807
2014	33.3761581800756
2015	35.1477443503748
2016	32.072254235477
2017	34.4607406908488
2018	34.0038227476158
2019	32.4384690871441