51% (1993)

57% (1991)

40% (1995)

54% (1994)

58% (1992)

59% (1994)

37% (1993)

45% (1995)

40% (1995)

54% (1995)

42% (1993)

47% (1993)

45% (1992)

49% (1992)

35% (1989)

30% (1994)

48% (1992)

36% (1990)

40% (1993)

45% (1993)