Year	% of population
2000	78.1
2001	81.5
2002	84.5
2003	87.2
2004	89.7
2005	91.4
2006	92.8
2007	94
2008	94.9
2009	95.6
2010	96.1
2011	96.6
2012	96.8
2013	97.1
2014	97.3
2015	97.5
2016	97.6
2017	97.7
2018	97.8
2019	97.9
2020	97.9
2021	98
2022	97.9