73% (1980)

57% (1979)

67% (1984)

55% (1975)

63% (1973)

60% (1983)

67% (1978)

70% (1977)

0% (1979)

57% (1979)

72% (1990)

67% (1980)

63% (1986)

67% (1976)

77% (1984)

70% (1976)

67% (1988)

62% (1985)

60% (1979)

67% (1982)