58% (1958)

65% (1982)

70% (1979)

77% (1975)

72% (1978)

64% (1969)

50% (1962)

10% (1991)

69% (1980)

0% (1987)

64% (1987)

63% (1981)

58% (1979)

0% (1976)

52% (2011)

10% (1998)

0% (1981)

57% (1983)

35% (2001)

74% (1973)