45% (1994)

45% (2013)

46% (2013)

46% (2008)

52% (2004)

35% (2011)

48% (2011)

56% (2002)

58% (2012)

49% (2004)

50% (2006)

49% (2009)

60% (2000)

60% (2005)

58% (2011)

53% (2002)

38% (2007)

50% (2010)

33% (1999)

41% (2010)