78% (1979)

70% (1978)

0% (1970)

87% (1971)

40% (1985)

75% (1977)

60% (1971)

0% (1975)

0% (1972)

60% (1991)

74% (1987)

70% (1982)

70% (1974)

60% (1984)

60% (1989)

80% (1979)

0% (1985)

83% (1976)

80% (1983)

0% (1971)