75% (1991)

0% (1987)

53% (1985)

54% (1985)

63% (1980)

70% (1980)

85% (1975)

90% (1969)

80% (1985)

100% (1980)

0% (1982)

0% (1987)

70% (1990)

0% (1988)

0% (1965)

55% (1977)

50% (1977)

80% (1989)

71% (1978)

35% (1978)