Year	per 1000 people
1960	0.386
1965	0.502
1970	0.38
1979	0.361
1981	0.359
1984	0.489
1990	0.57
1993	0.472
1995	0.57
1996	1.401
1997	1.401
2003	0.85
2008	0.406
2012	0.364
2013	0.482
2014	0.392
2015	0.429
2016	0.472