47% (1997)

30% (1993)

61% (1997)

52% (1996)

60% (1997)

50% (1990)

51% (1993)

62% (1991)

44% (1994)

0% (1998)

52% (1997)

10% (1991)

56% (1991)

0% (1992)

33% (1999)

47% (1992)

62% (1990)

47% (1996)

56% (1991)

44% (1993)