55% (1992)

81% (1993)

72% (1993)

80% (1974)

70% (1975)

81% (1971)

75% (1959)

70% (1976)

73% (1982)

74% (1995)

70% (2003)

69% (1998)

67% (1992)

51% (2002)

29% (2002)

60% (2004)

78% (1972)

72% (2004)

74% (1996)

79% (1989)