60% (2006)

64% (2011)

71% (2010)

55% (2008)

17% (2008)

38% (2007)

48% (2008)

25% (2006)

20% (2012)

33% (2009)

17% (2005)

44% (2011)

23% (2007)

38% (2012)

47% (2005)

55% (2012)

0% (1970)

70% (2004)

33% (2008)

54% (2006)