Year	per 1,000
1990	7.961953311736417
1991	7.87131672212752
1992	7.766526544844162
1993	7.652715543732588
1994	7.582239992864486
1995	7.415635790142404
1996	7.259631412687124
1997	7.085233555140844
1998	6.945328051115586
1999	6.753629790824705
2000	6.618288631934316
2001	6.479097541961883
2002	6.322139862372863
2003	6.201936497866075
2004	6.092493582799375
2005	6.744473403547248
2006	5.996474741330349
2007	5.939191054096154
2008	5.8637327506954104
2009	5.810408055888642
2010	5.773240009324234
2011	5.710442958863524
2012	5.646930663258443
2013	5.585594472252483
2014	5.5077287334789045
2015	5.428575224008804
2016	5.352659120083057
2017	5.224156893337507
2018	5.129892928682118
2019	5.045153820863097
2020	4.894418713666537
2021	4.792700055776598
2022	4.659567251783824