46% (1990)

63% (1988)

63% (1994)

47% (1995)

67% (1990)

57% (1993)

47% (1995)

52% (1995)

43% (1995)

48% (1995)

49% (1993)

45% (1994)

80% (1996)

49% (1994)

45% (1993)

48% (1994)

41% (1978)

25% (1992)

49% (1995)

50% (1993)