Year	per 1,000
1990	4.780874205105773
1991	3.891008756125716
1992	3.6815982509888276
1993	3.5300849039430053
1994	3.3583511219099216
1995	3.2321724095104876
1996	3.110608745265685
1997	3.002416266645561
1998	2.933845694878782
1999	2.813766810876
2000	2.7442498715341026
2001	2.6739553252857093
2002	2.613991055826722
2003	2.9654478837274043
2004	2.5029902171129383
2005	2.476869337800707
2006	2.489240498298116
2007	2.4865729721833865
2008	2.489274301053504
2009	2.4957365551495183
2010	2.458861711600568
2011	2.5096345557318496
2012	2.712595102426407
2013	2.7092224204848
2014	2.637849107365134
2015	2.598807643430603
2016	2.4154536029555227
2017	2.427826102191892
2018	2.406312954195582
2019	2.193785862198296
2020	2.0966824540379827
2021	2.05314360541866
2022	1.9845425623238397