Year	per 1,000
1990	25.881995389246246
1991	25.113203851676413
1992	24.837665645360758
1993	24.568920233880053
1994	26.102829380857635
1995	22.669952476206564
1996	22.017423707616512
1997	21.276147226768156
1998	20.41787667660737
1999	19.583355056538394
2000	18.74328157343392
2001	17.967860441921474
2002	17.18559918087456
2003	16.436357134596683
2004	15.65424553012729
2005	14.877415540203826
2006	14.097197959269483
2007	13.33714238434087
2008	12.691392136882147
2009	11.910232650526906
2010	11.3454730865715
2011	10.756539465630352
2012	10.167698280458133
2013	9.674864715232086
2014	9.269517602313174
2015	8.902712220217827
2016	8.577567927482061
2017	8.287333849491661
2018	8.029362150582287
2019	7.798106540968662
2020	7.5850698972737005
2021	7.385541826603583
2022	7.17287658359514