60% (1991)

50% (1975)

0% (1961)

0% (1968)

61% (1990)

50% (1986)

20% (1983)

40% (1963)

0% (1976)

54% (1988)

60% (1981)

0% (1960)

50% (1982)

40% (1966)

0% (1976)

72% (1966)

60% (1971)

50% (1961)

0% (1962)

0% (1962)