Year	% of population
2000	54.7
2001	56.4
2002	57.7
2003	59.2
2004	60.1
2005	62.3
2006	63
2007	64.55
2008	65.45
2009	66.75
2010	68.1
2011	69.2
2012	70.3
2013	71.5
2014	72.6
2015	73.5
2016	75.1
2017	75.7
2018	76.8
2019	78.2
2020	79.6
2021	80.2
2022	81.3