Year	per 1,000 people
1960	0.173
1965	0.116
1970	0.123
1979	0.38
1984	0.427
1988	0.429
1990	0.942
1993	0.821
1995	0.846
1998	1
2002	1.1054
2005	1.0199
2007	1.1912
2010	1.207
2016	1.83