Year	per 1,000 people
1981	3.088
1990	3.423
1991	3.446
1992	3.376
1993	3.117
1994	3.084
1995	3.128
1996	3.206
1997	3.029
1998	2.969
1999	2.893
2000	2.796
2001	2.686
2002	2.568
2003	2.541
2004	2.512
2005	2.46
2006	2.392
2007	2.309
2008	2.313
2009	2.307
2010	2.313
2011	2.272
2012	2.258
2013	2.266
2014	2.225
2019	2.168