66% (2009)

76% (2002)

78% (2003)

72% (2011)

70% (2000)

71% (1998)

64% (2003)

66% (2006)

59% (1992)

69% (2005)

63% (2000)

62% (2009)

70% (2013)

54% (2007)

56% (2005)

44% (2005)

70% (2000)

58% (2005)

46% (2010)

58% (2004)