Year	per 1,000
1990	10.794901160449882
1991	10.531644894320252
1992	10.4270057427917
1993	10.500234914558316
1994	9.992936898949983
1995	9.819735446794772
1996	9.637191359863026
1997	9.475093481699936
1998	9.346468446467066
1999	9.123944022510171
2000	8.943832536253359
2001	8.765062939646826
2002	8.580695279051994
2003	8.388389512371871
2004	8.200238638570882
2005	8.025610282214549
2006	7.904945855661456
2007	7.761225454242195
2008	7.647211227006739
2009	7.488066443557751
2010	7.376754248004963
2011	7.233017513038804
2012	7.085636715804877
2013	6.9567632936806305
2014	6.841906239236733
2015	6.713863902076519
2016	6.6167278725199195
2017	6.492269705085639
2018	6.3702593377151455
2019	6.295515292407478
2020	6.17513086884843
2021	6.074564318233165
2022	5.954776638482399