52% (2006)

47% (2008)

59% (2010)

44% (2004)

59% (2009)

36% (2011)

35% (2004)

53% (2004)

38% (2007)

54% (2007)

41% (2010)

60% (2004)

51% (2010)

49% (2004)

20% (2002)