49% (1973)

79% (2004)

15% (1979)

15% (1980)

20% (1986)

73% (1997)

68% (1968)

46% (1981)

0% (1960)

0% (1973)

20% (1980)

47% (1987)

65% (1958)

30% (1979)

55% (1983)

0% (1976)

0% (1973)

38% (1982)

20% (1982)

0% (1975)