Year	% of people at risk
2003	0.6
2004	0.7
2005	0.9
2006	0.6
2007	0.3
2008	0.2
2009	0.6
2010	0.6
2011	0.7
2012	0.9
2013	1.1
2014	0.6
2015	0.5
2016	0.5
2017	0.3
2018	0.2
2019	0.2
2020	0.1
2021	0.1
2022	0.1