68% (1998)

64% (2009)

61% (2000)

74% (2007)

61% (2009)

60% (2014)

56% (2016)

58% (2008)

52% (2008)

60% (2012)

66% (2008)

31% (2001)

52% (2007)

55% (2002)

59% (2016)

60% (1997)

46% (2001)

40% (2005)

53% (2009)

60% (2000)