40% (1988)

50% (1998)

44% (1997)

51% (1990)

64% (1995)

61% (1999)

59% (1997)

43% (1999)

74% (1998)

40% (1995)

53% (1990)

64% (1998)

60% (1998)

62% (1996)

54% (1996)

62% (1993)

44% (1998)

27% (1994)

59% (1989)

48% (1995)