64% (1970)

60% (1988)

50% (1979)

68% (1982)

36% (1989)

0% (1964)

58% (1979)

35% (1976)

61% (1979)

34% (1979)

55% (1987)

0% (1988)

40% (1985)

59% (1969)

42% (1967)

0% (1990)

0% (1987)

62% (1976)

0% (1991)

40% (1965)