63% (1995)

70% (1998)

55% (1995)

58% (2002)

60% (1994)

30% (1991)

58% (1998)

60% (1989)

78% (1992)

70% (1988)

40% (1992)

61% (1996)

59% (1997)

36% (1988)

62% (1999)

25% (1992)

52% (1994)

54% (1992)

43% (1994)

61% (1990)