58% (1984)

50% (1993)

59% (1985)

59% (1986)

64% (1984)

44% (2009)

54% (1989)

55% (1992)

30% (1993)

66% (1991)

49% (1995)

40% (1992)

26% (1995)

42% (1989)

57% (1995)

44% (1994)