78% (1982)

80% (1972)

75% (1968)

82% (1974)

76% (1969)

73% (1976)

61% (1971)

69% (1969)

69% (1984)

60% (2001)

66% (1979)

0% (1979)

70% (1970)

68% (1984)

71% (1976)

8% (1982)

61% (1986)

53% (1977)

55% (1981)

90% (1974)