69% (1998)

63% (2004)

59% (2003)

57% (2003)

50% (2006)

70% (1992)

47% (2007)

68% (2002)

52% (1997)

19% (2007)

65% (1995)

66% (1999)

32% (2006)

47% (2002)

52% (2004)

55% (2006)

73% (2004)

48% (1999)

60% (2001)

55% (2006)