66% (1964)

71% (1990)

48% (2000)

55% (1994)

65% (1978)

61% (1989)

71% (1983)

75% (2002)

69% (1982)

74% (2004)

72% (2006)

62% (1953)

49% (2001)

79% (1978)

75% (1997)

62% (2004)

0% (1973)

62% (1980)

61% (1955)

64% (1991)