53% (1978)

66% (1976)

67% (1979)

77% (1983)

70% (1974)

58% (1989)

46% (1973)

60% (1976)

60% (1974)

82% (1972)

43% (1989)

55% (1971)

46% (1981)

45% (1972)

0% (1981)

0% (1974)

43% (1977)

55% (1982)

70% (1973)

48% (1980)