Year	per 1,000
1990	7.984143549743153
1991	6.725471211526284
1992	6.449284739296463
1993	6.23215510244503
1994	6.107086987377594
1995	5.901575629312527
1996	5.790061043602025
1997	5.672221121386304
1998	5.560314785756082
1999	5.4574826023675875
2000	5.409091482274518
2001	5.378385246505141
2002	5.373387550590564
2003	5.7199131602854045
2004	5.3189826551126655
2005	5.272764526664553
2006	5.28462918166894
2007	5.233588610563465
2008	5.165743393947551
2009	5.117567284169179
2010	5.0025553057217875
2011	5.18445973823466
2012	6.305715577275216
2013	6.205577758567127
2014	5.681033659719463
2015	6.197666367304957
2016	5.828316872705939
2017	5.95810981779441
2018	6.360931548847391
2019	5.657573138180181
2020	5.17806971668374
2021	5.063670501041132
2022	4.769417580799274