Year	% of people at risk
2003	38.5
2004	40.3
2005	30.6
2006	28.5
2007	28.1
2008	29.7
2009	26.1
2010	23.2
2011	23.3
2012	20.8
2013	21.7
2014	26.5
2015	24.2
2016	24.7
2017	24.7