Year	per 1,000
1990	11.320370326797415
1991	11.076578799665986
1992	10.966441576844307
1993	11.039299156035652
1994	12.798770783816646
1995	10.363467568237114
1996	10.20191600981992
1997	10.011910805553043
1998	9.780138467694135
1999	9.570572912775187
2000	9.355914562838134
2001	9.16268524362856
2002	8.956788308047752
2003	8.764493042704538
2004	8.547417649582382
2005	8.346764722388563
2006	8.173134761217096
2007	7.955289436990335
2008	7.769420944386852
2009	7.55308638068873
2010	7.387038552459232
2011	7.192548597310487
2012	6.995543524950375
2013	6.845400339840474
2014	6.693202912762347
2015	6.537623542659846
2016	6.406849874161888
2017	6.264905608277016
2018	6.134294330432
2019	6.040174260687238
2020	5.9187534936954185
2021	5.805837858042881
2022	5.683501032119901