Year	% of population
1990	100
1991	100
1992	100
1993	100
1994	100
1995	100
1996	100
1997	100
1998	100
1999	100
2000	99.1
2001	99.1
2002	99
2003	99
2004	99
2005	99.8
2006	99
2007	99
2008	99
2009	99.1
2010	99.2
2011	99
2012	99.3
2013	99.7
2014	97.7
2015	99.5
2016	99.6
2017	100
2018	100
2019	100
2020	99.9
2021	99.8
2022	100