57% (1984)

64% (1984)

59% (1985)

59% (1986)

50% (1993)

45% (2009)

66% (1991)

55% (1989)

50% (1994)

49% (1995)

55% (1992)

57% (1995)

34% (1993)

40% (1992)

43% (1989)

26% (1995)