Year	per 1,000 people
1990	9.2
1991	9.317
1992	8.793
1993	9.354
1994	9.576
1995	9.723
1996	9.737
1997	9.009
1998	9.649
1999	9.592
2000	17.59
2001	18.14
2002	9.395
2003	9.083
2004	9.429
2005	9.713
2006	9.401
2007	9.8
2008	10.33
2009	10.3
2010	10.63
2011	10.71
2012	10.59
2013	10.58
2014	10.66
2015	10.83
2016	10.89
2017	10.83
2018	10.9
2019	10.84
2020	11.22
2021	11.43