65% (1992)

61% (1993)

74% (1993)

70% (1990)

43% (1988)

62% (1986)

59% (1993)

72% (1987)

48% (1995)

51% (2006)

75% (1986)

65% (1987)

69% (1994)

70% (1995)

70% (1989)

65% (1992)

57% (1993)

70% (1996)

67% (1989)

10% (1989)