Year	per 1,000
1990	11.602638872980366
1991	11.388748894179065
1992	11.189978124068608
1993	11.001145376395355
1994	10.869880591042394
1995	10.684261862862524
1996	10.49738395981655
1997	10.389405880754197
1998	10.20000246220106
1999	10.067017176708784
2000	9.904970380395786
2001	9.758762847595536
2002	9.597319889261959
2003	9.447130995706967
2004	9.276773626342093
2005	9.117779328874702
2006	9.01496142889263
2007	8.849954008660854
2008	8.733545920909295
2009	8.597568274693481
2010	8.48645125930325
2011	8.317148626757891
2012	8.203101862716546
2013	8.047631376091292
2014	7.942640693691586
2015	7.785125816028843
2016	7.659203088488706
2017	7.503175364301966
2018	7.3478167183969285
2019	7.253351360635047
2020	7.0633341964795315
2021	6.945594936552394
2022	6.770778131366138