50% (1993)

58% (1991)

54% (1994)

48% (1992)

36% (1993)

46% (1992)

40% (1995)

40% (1992)

59% (1994)

37% (1990)

36% (1989)

43% (1991)

42% (1993)

48% (1992)

45% (1993)

40% (1993)

51% (1995)

31% (1992)

30% (1994)

40% (1995)