68% (2004)

72% (2008)

65% (1998)

65% (2004)

63% (2002)

71% (2006)

60% (2015)

61% (2008)

63% (2004)

71% (2018)

66% (1999)

55% (2018)

61% (2002)

59% (2010)

69% (2000)

63% (2011)

68% (1996)

66% (1991)

70% (2011)

73% (1999)