55% (1984)

71% (1971)

72% (1971)

44% (1973)

20% (1983)

52% (1974)

48% (1980)

66% (1979)

72% (1984)

20% (1975)

53% (1983)

38% (1980)

48% (1975)

32% (1995)

44% (1997)

10% (1994)

49% (2007)

60% (1974)

70% (1981)

34% (1984)