81% (1995)

71% (1993)

71% (1999)

57% (1997)

71% (1996)

66% (2000)

66% (1994)

73% (1989)

65% (1990)

62% (1992)

60% (2001)

40% (1996)

66% (1997)

55% (1991)

64% (1997)

0% (1996)

30% (1996)

47% (1993)

75% (1991)

40% (1997)