Year	per 1,000 people
1990	3.143
1991	3.099
1992	3.115
1993	3.213
1994	3.228
1995	3.271
1996	3.238
1997	3.232
1998	3.211
1999	3.167
2000	3.091
2001	3.071
2002	3.048
2003	3.068
2004	3.187
2005	2.985
2006	3.295
2007	3.343
2008	3.267
2009	3.425
2010	3.493
2011	3.622
2012	3.55
2013	3.788
2014	3.831
2015	3.945
2016	5.13
2021	4.628