81% (1982)

57% (1994)

62% (1988)

62% (1985)

66% (1986)

63% (1975)

64% (1994)

65% (1981)

60% (1986)

54% (1978)

70% (1986)

62% (1988)

38% (1977)

62% (1984)

0% (1982)

56% (1980)

0% (1983)