60% (2011)

54% (2011)

57% (2009)

54% (2006)

56% (2013)

56% (2005)

40% (2009)

62% (2013)

49% (2009)

57% (2009)

69% (2011)

52% (2010)

62% (2003)

63% (2010)

62% (2007)

52% (2003)

30% (2012)

27% (2000)

0% (1996)

46% (2007)