Year	per 1000 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	1.106
2005	1.021
2007	1.192
2010	1.207