64% (1998)

54% (1994)

59% (1994)

65% (1998)

55% (2001)

56% (2003)

58% (1996)

40% (1990)

68% (1996)

49% (2000)

70% (1995)

22% (1997)

48% (1994)

40% (1993)

54% (2000)

56% (1999)

53% (1998)

60% (1989)

37% (1991)

49% (2004)