37% (1998)

65% (1998)

51% (2004)

41% (1999)

57% (2008)

56% (2007)

56% (1998)

35% (2004)

52% (2000)

44% (2004)

58% (2005)

35% (2011)

55% (2008)

62% (2006)

80% (1998)

55% (1999)

53% (2000)

56% (1996)

56% (2004)

40% (2002)