60% (1973)

53% (1991)

72% (1951)

73% (1970)

63% (1985)

75% (1955)

62% (1996)

74% (1964)

58% (1954)

75% (1971)

70% (1978)

60% (1981)

59% (1956)

60% (1948)

57% (1999)

72% (1982)

85% (1975)

67% (1949)

0% (1953)

58% (1960)