47% (1995)

57% (1993)

67% (1991)

39% (1994)

55% (1994)

48% (1994)

70% (1994)

45% (1990)

53% (1996)

60% (1989)

48% (1989)

48% (1991)

35% (1994)

62% (1989)

56% (1996)

43% (1991)

54% (1991)

50% (1994)

50% (1995)

67% (1996)