65% (1977)

40% (1978)

60% (1974)

70% (1997)

0% (1987)

63% (1985)

40% (1983)

30% (1990)

80% (1987)

73% (1979)

0% (1982)

0% (1963)

60% (1986)

70% (1984)

0% (1975)