Year	% of people at risk
2003	6
2004	4.3
2005	2.9
2006	2.6
2007	2.1
2008	3.2
2009	3.5
2010	3.7
2011	2.4
2012	2.4
2013	1.1
2014	2.3
2015	1.7
2016	1.4
2017	1.1
2018	1
2019	0.7
2020	0.7
2021	0.5
2022	0.4