40% (1993)

62% (1983)

50% (1980)

0% (1990)

50% (1992)

50% (1993)

50% (1993)

50% (1979)

43% (1992)

55% (1981)

50% (1998)

48% (1979)

50% (1988)

50% (1992)

42% (1993)

50% (1994)

38% (1995)

41% (1990)

53% (1994)

47% (1981)