Year	per 1,000 people
1990	0.939
1992	1.133
1993	1.252
1994	1.403
1995	1.562
1996	1.829
1997	2.039
1998	2.258
1999	2.525
2000	3.748
2001	2.973
2002	3.359
2003	3.643
2004	3.714
2013	7.538
2014	8.758
2015	9.076
2016	9.32
2017	9.706
2018	10.09
2019	7.375
2021	5.513