Year	% of people at risk
2003	0.8
2004	0.6
2005	0.4
2006	0.4
2007	0.3
2008	0.4
2009	0.4
2010	0.5
2011	0.6
2012	0.8
2013	0.8
2014	0.8
2015	1
2016	0.9
2017	1
2018	0.9
2019	0.7
2020	0.8
2021	0.7
2022	0.7