69% (1988)

62% (1993)

50% (1976)

70% (1981)

60% (1965)

71% (1981)

73% (1988)

0% (1987)

0% (1973)

0% (1992)

64% (1975)

80% (1968)

0% (1965)

64% (1966)

60% (1964)

70% (1975)

0% (1974)

0% (1965)

0% (1966)

0% (1966)