81% (1979)

60% (1979)

63% (1979)

67% (1988)

53% (1982)

60% (1977)

57% (1982)

50% (1974)

48% (1980)

10% (1988)

64% (1980)

77% (1982)

66% (1978)

0% (1970)

77% (1987)

48% (1988)

67% (1988)

50% (1989)

63% (1981)

0% (1985)