52% (1993)

31% (1992)

58% (1994)

48% (1992)

41% (1994)

43% (1991)

37% (1993)

40% (1995)

54% (1994)

42% (1995)

57% (1991)

40% (1993)

47% (1992)

51% (1995)

40% (1992)

42% (1993)

45% (1995)

44% (1987)

37% (1990)

47% (1993)