52% (1980)

57% (1977)

52% (1973)

54% (2014)

44% (1977)

48% (1977)

52% (1976)

53% (1995)

47% (1978)

74% (1973)

57% (1980)

45% (1978)

48% (1976)

60% (1975)

55% (1980)

70% (1974)

58% (1975)

58% (1977)

33% (1983)

58% (1976)