71% (1975)

68% (1982)

59% (1974)

0% (1973)

60% (1972)

59% (1975)

70% (1972)

57% (1973)

60% (1976)

71% (1974)

66% (1976)

55% (1978)

40% (1974)

50% (1972)

0% (1978)

0% (1976)

0% (1975)