48% (1989)

50% (1994)

60% (1989)

40% (1992)

50% (1995)

48% (1993)

42% (1994)

67% (1996)

40% (1990)

50% (1991)

66% (1993)

56% (1996)

85% (1995)

0% (1990)

33% (1992)

32% (1991)

53% (1996)

0% (1993)

40% (1996)

35% (1991)