82% (1992)

61% (1997)

63% (1992)

70% (1996)

60% (1996)

62% (1993)

63% (1993)

65% (1994)

49% (1994)

69% (1996)

67% (1992)

65% (1992)

64% (1997)

40% (1997)

67% (1997)

61% (1996)

51% (1998)

51% (1996)

43% (1994)

48% (1995)