Year	% of people at risk
2003	1.1
2004	2.4
2005	1
2006	2
2007	0.9
2008	0.6
2009	0.7
2010	0.6
2011	1
2012	0.9
2013	0.9
2014	0.7
2015	0.6
2016	0.3
2017	0.4
2018	0.3
2019	0.2
2020	0.2
2021	0.2
2022	0.1