Year	% of people at risk
2003	0.2
2004	0.3
2005	0.3
2006	0.3
2007	0.2
2008	0.2
2009	0.2
2010	0.2
2011	0.4
2012	0.7
2013	0.7
2014	0.7
2015	0.8
2016	0.5
2017	0.4
2018	0.2
2019	0.3
2020	0.3
2021	0.3
2022	0.3