66% (1993)

67% (2012)

63% (1989)

33% (2000)

68% (1973)

66% (1977)

42% (2002)

56% (1967)

77% (1993)

62% (2013)

76% (1997)

78% (1995)

67% (1976)

48% (1983)

38% (1997)

59% (1989)

56% (1985)

54% (1976)

71% (1991)

68% (2002)