Year Deaths per 100,000 1961 9.0066 1963 12.8936 1964 11.0361 1977 28.541 1978 30.6042 1979 31.3004 1980 34.7948 1982 30.2038 1984 26.046 1985 24.8737 1986 24.4533 1987 22.4662 1988 25.9142 1991 25.4178