Year	% of people at risk
2003	55.1
2004	52.3
2005	49.2
2006	48.4
2007	44.4
2008	44.1
2009	40.5
2010	40.9
2011	40.8
2012	36.7
2013	39.7
2014	35.1
2015	31.5
2016	31
2017	29.1