73% (1970)

63% (1974)

67% (1976)

70% (1968)

77% (1956)

72% (1966)

28% (1970)

64% (1972)

62% (1992)

54% (1981)

60% (1984)

51% (1956)

59% (1996)

75% (1987)

69% (1984)

52% (2008)

55% (1970)

37% (1969)

83% (1983)

72% (1971)