76% (1986)

67% (2003)

68% (1988)

74% (1990)

54% (1994)

68% (1993)

78% (1986)

66% (1983)

61% (2012)

71% (1991)

68% (1986)

66% (1986)

58% (2009)

58% (2003)

59% (2015)

56% (1991)

56% (1996)

76% (1991)

64% (1989)

54% (1999)