Year	per 1000 people
1980	2.602
1981	3.088
1982	2.769
1983	3.061
1984	2.928
1985	3.039
1986	3.147
1987	3.25
1988	3.323
1989	3.369
1990	3.374
1991	3.412
1992	3.349
1993	3.118
1994	3.096
1995	3.208
1996	3.293
1997	3.058
1998	3.01
1999	2.875
2000	2.823
2001	2.679
2002	2.6
2003	2.6
2004	2.5
2006	2.39
2007	2.301
2008	2.464
2009	2.441
2010	1.881
2011	1.911
2012	1.894
2013	1.886
2014	1.854