Year	% of population
2000	70
2001	73.3
2002	76.9
2003	80
2004	82.9
2005	85.5
2006	87.8
2007	89.8
2008	91.3
2009	92.6
2010	93.7
2011	94.7
2012	95.5
2013	96
2014	96.6
2015	97
2016	97.3
2017	97.6
2018	97.8
2019	98.1
2020	98.1
2021	98.4
2022	98.5