80% (1964)

65% (1982)

52% (1962)

55% (1980)

48% (1960)

52% (1958)

55% (1991)

0% (1986)

49% (1978)

35% (1974)

0% (2000)

57% (1971)

48% (1987)

0% (1969)

55% (1996)

38% (1964)

10% (1992)

55% (1985)

54% (1974)

55% (2001)