Year	per 1,000 people
1990	2.725
1991	3.696
1992	3.882
1993	3.724
1994	3.652
1995	3.553
1996	3.518
1997	3.454
1998	4.207
1999	3.486
2000	3.254
2001	3.555
2002	3.636
2003	3.85
2004	3.415
2005	3.215
2006	3.029
2007	3.131
2008	2.859
2009	2.897
2010	2.674
2011	2.98
2012	3.175
2013	3.511
2014	4.128
2015	5.176
2016	5.757
2017	5.945
2018	6.035
2019	6.095
2020	6.357