46% (1974)

60% (1981)

57% (1973)

57% (1973)

70% (1988)

70% (1973)

60% (1977)

20% (1983)

62% (1978)

35% (1975)

47% (1986)

33% (1992)

35% (1979)

54% (1972)

0% (1980)

30% (1973)