50% (1998)

41% (1993)

63% (1997)

52% (1999)

43% (1993)

51% (1993)

59% (1997)

58% (1995)

43% (1992)

67% (1994)

53% (1994)

62% (1995)

45% (1999)

43% (1996)

44% (1999)

48% (2000)

58% (1994)

48% (1996)

54% (1995)

49% (1993)