66% (1997)

63% (1995)

63% (1993)

62% (1997)

48% (1995)

58% (1998)

60% (1989)

62% (1994)

62% (1998)

56% (1995)

68% (1994)

55% (1992)

66% (1995)

52% (1994)

47% (1997)

62% (1995)

58% (1993)

58% (1998)

67% (1995)

65% (1999)