Year	% of population
2000	54.1
2001	53.2
2002	51.65
2003	51.3
2004	50.2
2005	49.1
2006	47.9
2007	46.65
2008	45.8
2009	45.6
2010	44.8
2011	43.7
2012	43.2
2013	42.1
2014	41.9
2015	41.8
2016	41.05
2017	41.3
2018	40.8
2019	42.05
2020	40.85
2021	40.9
2022	41.1