Year	per 1,000 people
1990	10.73
1991	9.23
1992	9.198
1993	9.076
1994	9.179
1995	9.146
1996	9.172
1997	8.988
1998	8.911
1999	8.092
2000	7.801
2001	7.761
2002	7.633
2003	7.534
2004	7.469
2005	7.489
2006	7.555
2007	7.563
2008	7.695
2009	7.601
2010	7.557
2011	7.65
2012	7.699
2013	7.67
2014	7.744
2015	7.818
2016	7.847
2017	7.817
2018	8.283
2019	7.905
2020	8.046
2021	9.663