68% (1970)

66% (1970)

35% (1989)

50% (1979)

0% (1978)

60% (1980)

0% (1991)

0% (1968)

59% (1969)

0% (1989)

61% (1985)

62% (1979)

60% (1988)

58% (1979)

55% (1969)

50% (1967)

70% (1971)

65% (1984)

68% (1982)

80% (1981)