68% (1998)

64% (2009)

59% (2014)

55% (2002)

61% (2000)

60% (2012)

74% (2007)

56% (2016)

61% (2009)

66% (2008)

46% (2001)

61% (2009)

62% (2000)

61% (2000)

57% (2006)

66% (2001)

26% (2001)

35% (2010)

49% (2008)

40% (2005)