Year	per 100 people
1975	16.67129758
1976	20.53107035
1977	20.16129032
1978	21.21734518
1979	21.09148431
1981	15.60265245
1982	15.64129301
1983	15.32175689
1984	14.76923077
1985	14.43522194
1986	14.07294476
1987	13.70019409
1988	13.07913988
1989	12.89490651
1990	12.50260471
1991	12.11876389
1992	11.84717149
1993	13.69059261
1994	14.59996107
1995	15.02520357
1996	15.46640889
1997	15.9220303
1998	16.38396299
1999	16.85447366
2000	17.34772552
2001	17.85197337
2002	17.38962419
2003	17.40139211
2004	17.41823108
2005	17.44524133
2006	17.48591412
2007	17.53189831
2008	17.57297667
2009	18.56738004
2010	0
2011	0
2012	0
2013	0
2014	0