66% (1997)

65% (2013)

68% (2018)

58% (2013)

62% (2018)

64% (2013)

61% (2016)

45% (2012)

48% (2010)

68% (2004)

48% (2018)

56% (2017)

65% (2018)

59% (2014)

64% (2015)

47% (2014)

53% (2017)

28% (2002)

55% (2014)

51% (2009)