Year	% of population
2001	9.6
2002	9.1
2003	8.3
2004	7.6
2005	5.4
2006	3.1
2007	2.5
2008	2.5
2009	2.5
2010	2.5
2011	2.5
2012	2.5
2013	2.5
2014	2.5
2015	2.5
2016	2.5
2017	2.5
2018	2.5
2019	2.5
2020	2.5
2021	2.5