45% (1990)

51% (1995)

67% (1990)

62% (1988)

62% (1994)

49% (1993)

41% (1994)

57% (1993)

49% (1994)

41% (1978)

45% (1995)

47% (1995)

48% (1994)

80% (1996)

20% (1988)

54% (1995)

50% (1995)

45% (1994)

60% (1995)

50% (1993)