Year	per 1000 people
1980	2.816
1981	2.895
1982	3.007
1983	3.089
1984	3.193
1985	3.297
1986	3.37
1987	3.444
1988	3.52
1989	3.573
1990	3.55
1991	3.484
1992	3.51
1993	3.555
1994	3.564
1995	3.513
1996	3.562
1997	3.582
1998	3.631
1999	3.245
2000	3.18
2001	2.694
2003	2.636
2006	2.66
2007	2.668
2010	2.439
2011	2.467
2012	2.469
2013	2.561
2014	2.537
2015	3.198