59% (1994)

62% (1990)

58% (1994)

53% (2000)

49% (1997)

55% (1996)

56% (1991)

66% (1997)

47% (2001)

70% (1997)

54% (1996)

68% (1998)

57% (2000)

65% (1990)

51% (1999)

62% (1994)

62% (1995)

69% (1995)

56% (1994)

57% (1991)