Year	% of people at risk
2003	0.5
2004	0.4
2005	0.3
2008	0.6
2009	0.2
2010	0.5
2011	0.3
2012	0.3
2013	0.3
2014	0.3
2015	0.3
2016	0.2
2017	0.3
2018	0.2
2019	0.1
2020	0.1
2021	0.1