78% (1993)

64% (1995)

74% (2002)

65% (2004)

69% (1996)

58% (2015)

63% (2008)

49% (2002)

73% (2006)

57% (1998)

61% (2014)

65% (1997)

61% (1996)

56% (2000)

57% (1998)

60% (1997)

68% (2012)

60% (2004)

62% (1993)

60% (2011)