59% (1978)

42% (1981)

47% (1973)

70% (2014)

45% (1987)

48% (1974)

46% (1970)

55% (1980)

60% (1976)

42% (1975)

61% (1977)

52% (1981)

56% (2015)

42% (1983)

69% (1979)

61% (1979)

59% (1979)

70% (1982)

56% (1978)

72% (1987)