Year	% of population
2000	99.8
2001	96.9
2002	95.2
2003	93.5
2004	91.8
2005	90.1
2006	88.4
2007	86.8
2008	85.1
2009	83.5
2010	81.9
2011	80.3
2012	78.7
2013	77.1
2014	75.5
2015	73.8
2016	72.2
2017	70.6
2018	67
2019	68.5
2020	69.4
2021	70.2
2022	70