58% (1991)

50% (1992)

56% (1991)

53% (1994)

63% (1984)

53% (1995)

53% (1994)

55% (1981)

50% (1982)

52% (1980)

46% (1994)

41% (1990)

50% (1990)

50% (1996)

50% (1988)

40% (1988)

50% (1994)

50% (1988)

0% (1990)

50% (1996)