71% (1993)

85% (2011)

57% (1992)

62% (2010)

68% (2012)

75% (2009)

81% (2005)

64% (2011)

73% (1998)

72% (2018)

61% (2009)

51% (1998)

75% (1984)

69% (2011)

66% (2012)

72% (1995)

68% (2009)

75% (2011)

69% (2015)

59% (2014)