73% (1953)

77% (1986)

72% (1966)

65% (1996)

71% (1955)

57% (1967)

65% (1951)

47% (1993)

74% (1966)

52% (1992)

64% (1966)

67% (1995)

57% (1968)

63% (1981)

50% (1995)

63% (1997)

68% (1989)

72% (1989)

66% (1989)

55% (1966)