60% (2011)

69% (2011)

57% (2009)

54% (2006)

54% (2011)

62% (2003)

57% (2009)

48% (2009)

56% (2005)

56% (2013)

62% (2013)

30% (1998)

40% (2009)

50% (2010)

62% (2007)

35% (1998)

25% (2000)

62% (2010)

44% (2007)

20% (2012)