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