67% (2003)

78% (1986)

73% (1990)

76% (1986)

66% (1983)

68% (1986)

53% (1994)

58% (2003)

67% (1993)

68% (1988)

61% (2012)

64% (1989)

56% (1991)

72% (1991)

66% (1986)

56% (1996)

76% (1991)

53% (1999)

47% (2005)

58% (2009)