Year	per 100,000 adults
2004	18.2
2005	17.75
2006	16.96
2007	17
2008	16.74
2009	16.4
2010	16.72
2011	16.57
2012	16.19
2013	15.72
2014	15.35
2015	15.07
2016	14.86
2017	14.42
2018	14.53
2019	14.39
2020	14.09
2021	13.87