62% (1992)

72% (1991)

57% (1994)

65% (1997)

75% (1992)

60% (1994)

63% (1998)

63% (1996)

60% (1996)

46% (1996)

65% (1993)

63% (1998)

55% (1999)

56% (1992)

56% (1997)

68% (1996)

57% (1998)

54% (1992)

47% (1997)

59% (1991)