50% (1998)

53% (1999)

50% (1993)

63% (1997)

48% (1996)

44% (1999)

44% (1992)

47% (1997)

59% (1997)

52% (1997)

57% (1995)

43% (1996)

51% (1999)

53% (1998)

57% (1994)

45% (1998)

68% (1997)

52% (1994)

55% (1995)

51% (1996)