65% (1981)

59% (1969)

64% (1970)

68% (1982)

61% (1979)

60% (1988)

0% (1988)

58% (1990)

35% (1976)

66% (1970)

0% (1991)

0% (1964)

58% (1979)

60% (1980)

50% (1965)

0% (1990)

62% (1976)

36% (1989)

52% (1959)

0% (1986)