55% (1994)

54% (1995)

56% (1997)

65% (1995)

49% (1991)

41% (2000)

40% (1998)

49% (1992)

43% (1991)

60% (1993)

61% (1994)

49% (1994)

46% (1994)

42% (1994)

65% (1993)

52% (1991)

42% (1999)

60% (1997)

58% (1991)

43% (1992)