76% (2003)

61% (1974)

50% (1985)

65% (1987)

74% (1966)

63% (2000)

48% (1961)

33% (1983)

0% (1968)

57% (1953)

71% (1980)

0% (2000)

57% (1989)

0% (1987)

71% (1982)

46% (1960)

57% (1991)

50% (1958)

48% (1973)

63% (1966)