66% (1995)

71% (1997)

80% (1966)

60% (1978)

63% (1987)

69% (1954)

63% (1972)

66% (1976)

52% (1996)

67% (1971)

54% (1980)

66% (1969)

67% (1978)

62% (1972)

60% (1979)

57% (1970)

61% (1971)

59% (1979)

59% (1969)

47% (1995)