45% (1995)

57% (1993)

45% (1990)

62% (1988)

62% (1994)

68% (1990)

51% (1995)

49% (1993)

54% (1995)

46% (1995)

80% (1996)

45% (1993)

41% (1978)

48% (1994)

49% (1994)

47% (1995)

41% (1994)

65% (1991)

53% (1997)

34% (1996)