0% (1974)

75% (1993)

44% (1986)

60% (1991)

47% (1984)

50% (1982)

55% (1983)

10% (1988)

63% (1968)

45% (1985)

22% (1956)

65% (1982)

47% (1988)

59% (1990)

53% (1965)

56% (1964)

55% (1992)

60% (1965)

51% (1960)

31% (1980)