Year	% of people at risk
2003	4.5
2004	3.5
2005	3.9
2006	2.3
2007	1.8
2008	1.8
2009	2.1
2010	1.7
2011	1.7
2012	1.8
2013	1.7
2014	2
2015	2.4
2016	1.9
2017	1.8