59% (1989)

59% (2014)

55% (2014)

69% (1983)

76% (2013)

62% (2000)

66% (2008)

54% (1998)

67% (2004)

65% (1999)

72% (1998)

71% (2006)

61% (1999)

73% (2004)

68% (1999)

72% (2003)

58% (2001)

75% (1992)

69% (2011)

70% (1995)