Year	% of population
2000	40.9
2001	41.35
2002	41.5
2003	42.1
2004	41.8
2005	42.7
2006	43.1
2007	43.1
2008	43.7
2009	44
2010	44.6
2011	44.8
2012	45.7
2013	45.95
2014	46.6
2015	47.3
2016	47.8
2017	48.3
2018	48.6
2019	49
2020	49.7
2021	49.8
2022	50