70% (1971)

74% (1981)

77% (1970)

53% (1974)

72% (1982)

64% (1979)

59% (1984)

73% (1970)

50% (1976)

50% (1984)

48% (1984)

66% (1978)

0% (1977)

10% (1964)

55% (1987)

58% (1983)

47% (2005)

69% (1986)

67% (1988)

90% (1999)