Year	per 1,000 adults
2006	6.52
2007	7.36
2008	8.16
2009	9.11
2010	10.35
2011	11.81
2012	13.26
2013	14.93
2014	16.95
2015	19.21
2016	22.11
2017	25.37
2018	28.97
2019	32.97
2020	36.21
2021	39.79