56% (1996)

40% (2004)

58% (2008)

44% (2004)

59% (2005)

65% (1998)

55% (2007)

62% (2006)

40% (2002)

56% (1998)

56% (2009)

51% (2004)

55% (2008)

40% (2011)

54% (2004)

72% (1996)

48% (2003)

41% (1999)

49% (2005)

38% (1998)