62% (1992)

54% (1989)

66% (1997)

54% (1993)

66% (1992)

54% (1994)

61% (2001)

50% (1998)

48% (1996)

55% (2007)

69% (2000)

57% (1997)

73% (2003)

56% (2001)

66% (2004)

59% (2002)

54% (1995)

52% (2002)

40% (1993)

61% (1999)