60% (1987)

50% (2000)

37% (1984)

62% (1984)

45% (1997)

59% (1982)

50% (1995)

62% (1981)

41% (2006)

0% (1960)

0% (1950)

32% (2004)

43% (1952)

0% (1953)

52% (1992)

0% (1957)

60% (1977)

48% (1996)

57% (1958)

0% (1955)