72% (1991)

62% (1988)

53% (1990)

48% (1987)

52% (1987)

56% (1984)

63% (1986)

56% (1984)

65% (1986)

36% (1988)

64% (1982)

38% (1991)

70% (1982)

48% (1987)

75% (2005)

56% (1991)

54% (1988)