68% (1998)

64% (2009)

61% (2000)

75% (2007)

60% (2012)

56% (2016)

59% (2014)

61% (2009)

66% (2008)

56% (2006)

59% (2016)

61% (2009)

40% (2005)

58% (2002)

58% (2008)

53% (2007)

30% (2001)

52% (2008)

60% (2000)

57% (2009)