Year	per 1,000 adults
2004	1.16
2005	1.25
2006	1.24
2007	1.27
2008	2.25
2009	1.78
2010	1.85
2011	1.8
2012	2.13
2013	2.95
2014	3.8
2015	2.21
2016	2.04
2017	1.68
2019	11.23
2020	10.54