60% (1985)

58% (1979)

68% (1970)

61% (1979)

68% (1980)

48% (1987)

62% (1987)

0% (1990)

48% (1983)

66% (1970)

59% (1969)

40% (1985)

50% (1987)

70% (1963)

50% (1971)

20% (1979)

60% (1980)

0% (1973)

68% (1982)

40% (1979)