Year	per 1,000 adults
2008	26.35
2009	29.44
2010	30.63
2011	27.45
2012	30.68
2013	26.5
2014	31.08
2015	29.88
2016	23.81
2017	21.79
2018	18.55
2019	25.42
2020	29.61
2021	35.51