Year	per 1000 people
1980	3.362
1985	3.799
1986	3.877
1987	3.906
1988	3.964
1989	3.99
1990	3.917
1991	3.916
1992	3.881
1993	3.928
1994	3.896
1995	3.925
1996	3.899
1997	3.831
1998	3.602
1999	3.521
2000	3.607
2001	3.536
2003	3.547
2006	3.63
2007	3.794
2009	3.782
2010	3.636
2011	3.407
2012	3.454
2013	3.415
2014	3.402