67% (1998)

59% (1994)

49% (2001)

58% (1983)

58% (1991)

45% (1989)

70% (1987)

53% (1989)

90% (1998)

56% (1993)

48% (1997)

54% (1998)

0% (1992)

52% (1990)

0% (1981)

62% (1993)

10% (1993)

45% (1994)

50% (1994)

56% (2001)