67% (2003)

58% (2009)

68% (1986)

58% (2003)

61% (2012)

67% (1983)

68% (1993)

76% (1986)

74% (1990)

56% (1991)

54% (1994)

68% (1988)

77% (1986)

70% (1990)

66% (1986)

53% (1999)

71% (1991)

59% (2015)

57% (1996)

76% (1991)