62% (2013)

69% (2011)

50% (2010)

54% (2006)

57% (2009)

54% (2011)

56% (2005)

57% (2009)

56% (2013)

60% (2011)

52% (2003)

20% (2012)

48% (2009)

40% (2009)

0% (1996)

30% (1998)

35% (1998)

62% (2010)

25% (2000)

44% (2007)