68% (1998)

64% (2009)

74% (2007)

61% (2000)

59% (2014)

56% (2016)

61% (2009)

66% (2008)

46% (2001)

55% (2002)

40% (2005)

60% (2012)

59% (2016)

49% (2008)

57% (2006)

58% (2002)

53% (2009)

56% (2006)

62% (2000)

55% (2001)