Year	% of population
1998	15.3
1999	16.0729999542236
2000	17
2001	19.6
2002	21.3
2003	23
2004	24.8
2005	26.5
2006	27.9
2007	30
2008	31.8
2009	33.7
2010	30.8
2011	39.7
2012	39.1
2013	41
2014	45.7
2015	44.7
2016	46.8
2017	48
2018	50
2019	52.5
2020	54.1
2021	55.7
2022	57.2