70% (1999)

52% (1997)

50% (1997)

61% (1996)

70% (1994)

55% (1998)

61% (1995)

62% (2000)

10% (1997)

62% (1995)

59% (2000)

66% (1999)

46% (2000)

70% (1999)

57% (1991)

75% (1997)

0% (1997)

30% (1999)