Year	per 1,000
1990	5.198760136518486
1991	5.185438572018857
1992	5.179599894859378
1993	5.290171025698012
1994	5.3721256173994325
1995	5.528768245465708
1996	5.446257329071492
1997	5.422055603546352
1998	5.478651232728373
1999	5.471797888635925
2000	5.472961830380697
2001	5.437140364957978
2002	5.286939616594646
2003	5.105873133765433
2004	4.980750119515795
2005	4.813199366525947
2006	4.650950448043449
2007	4.544093960159343
2008	4.387006743349864
2009	4.276690865440757
2010	4.113033653829124
2011	4.040373684802069
2012	3.92821249180392
2013	3.8925966320456324
2014	3.872572977143001
2015	3.808081986992803
2016	3.808322759416133
2017	3.7835858299252134
2018	3.7709514031612352
2019	3.6974838070334
2020	3.7200759194259705
2021	3.6955771222195173
2022	3.8281122379883827