73% (1970)

72% (1951)

51% (1991)

63% (1985)

60% (1973)

74% (1964)

62% (1996)

70% (1978)

57% (1999)

75% (1955)

85% (1975)

72% (1982)

60% (1948)

59% (1956)

60% (1981)

58% (1960)

0% (1953)

67% (1949)

55% (1957)

58% (1954)