Year	per 1000 people
1960	0.195
1965	0.2
1970	0.309
1980	0.563
1981	0.568
1986	0.596
1987	0.576
1990	0.603
1993	0.603
1998	0.55
2001	0.543
2004	0.658
2005	0.66
2007	0.528
2010	0.639
2014	0.854