84% (1980)

82% (1973)

59% (1982)

82% (1978)

70% (1978)

63% (1988)

82% (1975)

73% (1980)

60% (1975)

74% (1981)

73% (1982)

77% (1974)

0% (1979)

70% (1980)

67% (1984)

60% (1983)

55% (1975)

63% (1977)

67% (1988)

77% (1985)