Year	% of population
2000	41.3
2001	41.8
2002	42.9
2003	44.1
2004	45.45
2005	46.7
2006	48.5
2007	50.3
2008	52.7
2009	55.2
2010	57.4
2011	60.1
2012	62.9
2013	65.8
2014	68.8
2015	71.5
2016	74.4
2017	77.1
2018	79.5
2019	82
2020	83.8
2021	85.9
2022	87.8