65% (1973)

70% (1983)

71% (1969)

50% (2001)

71% (1965)

62% (1989)

67% (1969)

80% (1983)

64% (1962)

44% (1987)

57% (1994)

61% (1961)

54% (1983)

47% (1981)

71% (1962)

30% (1973)

50% (1975)

41% (1986)

59% (1971)

60% (1953)