81% (1995)

67% (1994)

71% (1996)

71% (1993)

72% (1999)

57% (1997)

66% (2000)

66% (1990)

60% (2001)

40% (1996)

75% (1991)

66% (1997)

73% (1989)

62% (1992)

64% (1997)

47% (1993)

70% (1986)

0% (1996)

40% (1996)

55% (1991)