56% (1994)

62% (1992)

49% (1989)

66% (1997)

61% (2001)

55% (1993)

67% (1992)

69% (2000)

57% (1997)

54% (1995)

74% (2003)

62% (2002)

71% (1996)

50% (1998)

59% (2002)

43% (1982)

54% (1996)

48% (1996)

69% (1996)

40% (1993)