62% (1992)

55% (1994)

67% (1992)

61% (2001)

66% (1997)

55% (1993)

59% (2002)

74% (2003)

69% (2000)

54% (1995)

55% (2007)

54% (1996)

48% (1996)

57% (1997)

54% (1989)

40% (1993)

50% (2001)

70% (1996)

53% (2002)

65% (1999)