Year	per 1,000 people
1990	11.37
1991	11.77
1992	11.8
1993	11.76
1994	10.21
1995	10.48
1996	10.89
1997	10.98
1998	10.82
1999	10.84
2000	10.83
2001	10.82
2002	10.78
2003	10.71
2004	10.63
2005	10.92
2006	10.74
2007	10.83
2008	11.09
2009	11.13
2010	11.34
2011	11.39
2012	11.38
2013	11.31
2014	11.27