79% (1964)

64% (1982)

52% (1962)

49% (1978)

52% (1958)

54% (2002)

55% (1985)

55% (1980)

38% (1964)

56% (1993)

30% (1991)

55% (2001)

57% (1971)

35% (1974)

48% (1960)

48% (1987)

33% (1965)

54% (1974)

55% (1996)

55% (1991)