50% (1999)

61% (2001)

0% (1996)

45% (1992)

44% (1993)

63% (1999)

53% (1989)

30% (1995)

46% (1996)

75% (1994)

47% (1991)

65% (1990)

52% (1990)

55% (2001)

43% (1996)

30% (1992)

30% (1994)

0% (1996)

46% (1999)

56% (1994)