68% (1978)

70% (1972)

75% (1977)

46% (1977)

70% (1979)

0% (1977)

57% (1975)

68% (1984)

66% (1984)

52% (1982)

70% (1968)

63% (1972)

58% (1970)

51% (1978)

60% (1975)

63% (1976)

57% (1988)

30% (1968)

67% (1976)

60% (1970)