68% (1987)

52% (1988)

38% (1988)

60% (1988)

52% (1991)

61% (1989)

57% (1990)

68% (1990)

58% (1988)

49% (1992)

70% (1987)

78% (1992)

56% (1986)

50% (1990)

0% (1992)

75% (2004)

0% (2005)

55% (1991)

47% (2000)

0% (1997)