81% (1982)

67% (1986)

57% (1994)

64% (1994)

60% (1986)

65% (1981)

62% (1988)

63% (1975)

56% (1980)

30% (1977)

62% (1985)

54% (1978)

62% (1984)

62% (1988)

0% (1983)

70% (1986)

0% (1982)