73% (1991)

72% (1986)

70% (1986)

66% (1990)

63% (1991)

72% (1991)

73% (1989)

58% (1986)

65% (1990)

50% (1987)

0% (1982)

53% (1987)

65% (1992)

42% (1988)

0% (1991)

60% (1985)

0% (1991)

0% (1986)

0% (1987)