62% (1980)

61% (1999)

46% (1975)

46% (1980)

37% (1986)

60% (1986)

54% (1985)

64% (1978)

57% (1979)

0% (1982)

60% (1972)

0% (1990)

74% (1982)

40% (1985)

56% (1973)