78% (1994)

68% (1998)

78% (1989)

67% (2008)

76% (2000)

66% (2009)

78% (1984)

68% (2007)

67% (1987)

62% (2012)

59% (1998)

69% (2005)

66% (1994)

63% (2009)

62% (1995)

50% (2009)

48% (2009)

50% (1993)

63% (2009)

53% (2008)