63% (1988)

60% (1986)

57% (1979)

37% (1986)

54% (1985)

46% (1980)

46% (1975)

0% (1982)

74% (1982)

61% (1999)

0% (1990)

64% (1978)

56% (1973)

60% (1972)

40% (1985)