Year	% of population
2000	52.9
2001	51.5
2002	52.5
2003	53.6
2004	54.7
2005	55.8
2006	56.9
2007	58
2008	59.1
2009	56.9
2010	61.4
2011	62.6
2012	57.9
2013	65
2014	68.6
2015	67.3
2016	69.4
2017	74.3
2018	71
2019	75.1
2020	76.8
2021	78.5
2022	78