70% (1971)

74% (1981)

77% (1970)

53% (1974)

72% (1982)

59% (1984)

64% (1979)

50% (1984)

58% (1983)

50% (1976)

63% (1973)

65% (1988)

0% (1977)

73% (1970)

65% (1978)

55% (1987)

47% (2005)

20% (1991)

0% (1990)

44% (1972)