62% (1992)

55% (1994)

54% (1995)

66% (1997)

61% (2001)

74% (2003)

59% (2002)

48% (1996)

55% (1993)

51% (2006)

54% (1996)

62% (2002)

57% (1997)

40% (1993)

50% (2001)

67% (1992)

41% (2007)

53% (2002)

50% (1998)

57% (1989)