58% (1977)

52% (1973)

52% (1980)

44% (1977)

58% (1980)

48% (1977)

53% (1995)

74% (1973)

55% (2014)

55% (1980)

47% (1978)

48% (1976)

52% (1976)

59% (1977)

60% (1975)

50% (1977)

58% (1976)

32% (1983)

45% (1978)

70% (1974)