50% (1993)

65% (1991)

59% (1985)

64% (1984)

58% (1984)

55% (1992)

44% (2009)

40% (1992)

53% (1989)

58% (1986)

42% (1989)

49% (1995)

30% (1993)

44% (1994)

57% (1995)

26% (1995)