81% (1989)

56% (2003)

57% (2004)

74% (1997)

70% (1995)

88% (2002)

74% (1997)

71% (2008)

82% (1999)

67% (1949)

61% (1989)

74% (2004)

51% (1956)

84% (1997)

53% (2002)

74% (1999)

86% (1993)

79% (1988)

77% (1997)

66% (2003)