Year	per 1,000 people
1990	1.564
1991	1.711
1992	2.011
1993	2.034
1994	2.003
1995	2.113
1996	2.113
1997	2.143
1998	2.202
1999	2.277
2000	2.239
2001	2.394
2002	2.425
2003	2.594
2004	2.763
2005	3.56
2006	3.66
2007	3.867
2008	3.981
2009	4.034
2010	4.16
2011	4.136
2012	3.98
2013	3.958
2014	3.035
2015	3.143
2016	3.219
2017	3.282
2018	3.302
2019	3.343
2020	3.484
2021	4.062