48% (1983)

41% (1985)

43% (1984)

46% (1985)

31% (1985)

50% (1990)

70% (1986)

74% (1974)

20% (1989)

66% (1983)

70% (1979)

61% (1980)

74% (1981)

52% (2011)

32% (1988)

35% (2001)

40% (2004)

72% (1973)

68% (1980)

71% (1973)