Year	% of population
2000	46
2001	48.4
2002	50.1
2003	51.8
2004	53.5
2005	55.2
2006	57
2007	58.7
2008	60.5
2009	62.2
2010	64.5
2011	66.3
2012	67.8
2013	69.4
2014	71.2
2015	73
2016	74.8
2017	76.5
2018	78.3
2019	80.1
2020	81.9
2021	83.6
2022	85.3