67% (2003)

77% (1986)

67% (1993)

76% (1986)

68% (1986)

58% (2003)

74% (1990)

76% (1991)

66% (1983)

56% (1996)

53% (1994)

54% (1985)

69% (1988)

61% (2012)

59% (2015)

67% (1986)

58% (2009)

56% (1991)

71% (1991)

65% (1989)