Year	% of population
2001	16.8
2002	13.3
2003	10.3
2004	7.3
2005	4.7
2006	2.8
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