Year	% of people at risk
2003	28
2004	27.9
2005	26.9
2006	24.6
2007	23.8
2008	24.4
2009	21.3
2010	20.1
2011	20.5
2012	20.4
2013	20.4
2014	20.7
2015	21
2016	21.2
2017	21.3