29% (2008)

70% (1998)

68% (2000)

57% (2002)

52% (2005)

55% (2007)

39% (2002)

58% (2001)

42% (2000)

44% (2004)

53% (2000)

45% (2000)

40% (2002)

59% (1996)

51% (2008)

56% (1998)

54% (2004)

38% (2004)

49% (2005)

35% (2000)