60% (1979)

47% (1978)

0% (1991)

50% (1979)

57% (1996)

60% (1975)

37% (1989)

50% (1980)

0% (1986)

50% (1978)

58% (1988)

60% (1988)

0% (1977)

0% (1988)

0% (1975)

0% (1978)

33% (1979)

42% (1979)

47% (1982)

53% (1980)