62% (2001)

73% (1991)

68% (2003)

72% (1993)

74% (1990)

76% (2004)

45% (2009)

75% (1951)

53% (1984)

70% (1993)

77% (1948)

59% (2002)

37% (2004)

51% (2000)

54% (2009)

71% (1999)

58% (1998)

62% (1980)

62% (2006)

49% (2011)