Year per 1,000 people 1960 1.31314718723297 1970 1.29849994182587 1975 1.29009997844696 1989 0.523999989032745 1990 0.7296000123 1994 0.2475000024 1996 0.4499999881 1998 0.400000006 2007 0.1 2008 0.3