76% (1997)

65% (1995)

51% (1993)

54% (1995)

54% (1994)

53% (1995)

45% (1994)

60% (1996)

40% (1996)

0% (1994)

32% (1994)

50% (1994)

40% (1996)

58% (1995)

10% (1997)

0% (1993)

85% (1995)

67% (1993)

0% (1995)

57% (1994)