Year	% of people at risk
2003	0.4
2004	0.2
2005	0.2
2006	0.2
2007	0.2
2008	0.3
2009	0.4
2010	0.2
2011	0.3
2012	0.7
2013	1.5
2014	1.2
2015	0.7
2016	0.4
2017	0.3
2018	0.4
2019	0.2
2020	0.1
2021	0.1
2022	0.3