60% (1997)

66% (1974)

59% (1976)

63% (1973)

63% (1991)

54% (1990)

45% (1977)

62% (1977)

52% (1991)

0% (1989)

36% (1974)

65% (1973)

42% (1976)

30% (1986)

0% (1985)