Year	per 1,000 people
1990	1.565
1991	1.632
1992	1.657
1993	1.421
1994	1.619
1995	1.589
1996	1.689
1997	1.702
1998	1.633
1999	1.657
2000	1.63
2001	1.592
2002	1.636
2003	1.532
2009	1.883
2010	1.662
2011	2.076
2013	1.944
2014	2.192
2015	2.515
2016	2.863
2017	2.842
2018	2.516