60% (1972)

59% (1979)

56% (1972)

62% (1972)

73% (1964)

53% (1979)

60% (1969)

60% (1981)

48% (1968)

65% (1986)

55% (1981)

51% (1968)

53% (1976)

30% (1976)

55% (1964)

58% (1983)

52% (1982)

58% (1962)

44% (1981)

47% (1978)