Year	% of population
2000	67.1
2001	67.4
2002	66.9
2003	66.8
2004	66.3
2005	65.8
2006	65.45
2007	64.8
2008	64.2
2009	63.65
2010	63
2011	62.8
2012	62.2
2013	61.9
2014	61.8
2015	61.4
2016	61.6
2017	61.6
2018	61.75
2019	61.85
2020	62.1
2021	62.3
2022	62.6