Year	per 1,000
1990	5.199316918331775
1991	5.348103313254414
1992	5.865964863855042
1993	6.103301696661088
1994	5.934091865288617
1995	5.885597131431853
1996	5.4517001918653145
1997	5.294110502687605
1998	5.203617364832964
1999	5.308562573312566
2000	5.036523653327303
2001	4.849381091133492
2002	4.6347962136252026
2003	4.383872932649521
2004	4.17680806563722
2005	4.079046892888461
2006	3.959307263735546
2007	3.790121815276968
2008	3.6133714077317127
2009	3.423326530529582
2010	3.2413032663480044
2011	3.1178246660714852
2012	3.015933749364441
2013	2.91506684887601
2014	2.9044709176030374
2015	2.7910813984168863
2016	2.736189953223864
2017	2.606331532664525
2018	2.523203710790375
2019	2.472031760721422
2020	2.5600788385720836
2021	2.5371261203080504
2022	2.9881884857500323