70% (1974)

44% (1985)

39% (1989)

20% (1998)

20% (1980)

70% (2001)

40% (1976)

30% (1980)

55% (1954)

48% (1974)

10% (2000)

50% (1951)

0% (1999)

0% (1994)

54% (1937)

0% (1980)

47% (1994)

52% (1972)

0% (1977)

10% (1982)