Year	per 1,000 people
1995	2.273
1997	2.442
1998	2.485
2000	2.542
2001	2.581
2002	2.867
2003	3.302
2004	3.108
2005	3.196
2006	3.042
2007	3.184
2009	3.6
2015	3.626