Year	per 1,000
1990	14.173394683585537
1991	13.92498545925901
1992	13.232540124033001
1993	12.904978969198847
1994	12.558611566561396
1995	12.223577317841183
1996	11.97096296415524
1997	11.68316753288562
1998	11.491091404297789
1999	11.306666547649169
2000	11.081875674406406
2001	10.834084539266367
2002	10.512289829152582
2003	10.213288160158623
2004	9.971148637845264
2005	9.796395587618566
2006	9.307621268095748
2007	9.001450327298867
2008	8.742164609619824
2009	8.429701719896947
2010	8.19783315816864
2011	7.901948485887309
2012	7.593314974261423
2013	7.281207204526036
2014	6.958303150272008
2015	6.715257211073529
2016	6.367661693256962
2017	6.124804066684609
2018	5.914803680661265
2019	5.724639331502491
2020	5.54572929087496
2021	5.446610926258145
2022	5.327681253721145