Year	% of population
2000	98.4
2001	98.7
2002	98.7
2003	98.8
2004	98.9
2005	98.9
2006	98.8
2007	98.7
2008	98.7
2009	98.5
2010	98.3
2011	98
2012	97.6
2013	97.2
2014	96.8
2015	96.3
2016	95.7
2017	95
2018	94.6
2019	93.6
2020	92.5
2021	91.5
2022	90.5