Year	% of population
1990	100
1991	100
1992	100
1993	100
1994	100
1995	100
1996	100
1997	100
1998	100
1999	100
2000	98.7
2001	98.8
2002	99
2003	98.8
2004	99.1
2005	98.6
2006	98.9
2007	99
2008	99.1
2009	99.2
2010	99.3
2011	99.4
2012	99.5
2013	99.6
2014	99.8
2015	99.9
2016	99.9
2017	100
2018	100
2019	100
2020	100
2021	100
2022	100