65% (1984)

74% (1975)

77% (1986)

74% (1994)

50% (1980)

63% (1987)

70% (1975)

47% (1981)

50% (1985)

0% (1976)

64% (1976)

73% (1984)

48% (1987)

50% (1982)

60% (1991)

50% (1975)

68% (1981)

68% (1985)

68% (1979)

60% (1984)