75% (1993)

70% (1990)

60% (1993)

65% (1992)

59% (1993)

43% (1988)

62% (1987)

67% (1989)

63% (1986)

70% (1996)

57% (1986)

69% (1994)

48% (1995)

57% (1993)

72% (1987)

70% (1992)

60% (1989)

0% (1994)

51% (2006)

75% (1986)