Year	per 1,000 people
1990	2.047
1991	3.931
1992	3.982
1993	4.041
1994	4.091
1995	4.085
1996	2.74
1997	2.859
1998	2.913
1999	3.039
2000	3.122
2001	3.127
2002	3.126
2003	3.22
2004	3.441
2005	3.543
2006	3.623
2007	3.559
2008	3.544
2009	3.597
2010	3.758
2011	3.836
2012	3.825
2013	3.812
2014	3.802
2015	3.847
2016	3.824
2017	3.878
2018	4.021
2019	4.404
2020	4.577