78% (1984)

78% (1994)

63% (2012)

67% (2008)

60% (1998)

67% (1987)

70% (2005)

48% (2009)

66% (1994)

78% (1989)

69% (1998)

76% (2000)

74% (2001)

64% (2009)

66% (2009)

62% (1995)

68% (2007)

68% (2008)

59% (1993)

51% (2008)