63% (2000)

73% (1999)

69% (1993)

65% (2009)

59% (2011)

62% (1999)

65% (2002)

71% (2004)

62% (2002)

75% (1999)

62% (2003)

61% (1998)

60% (2010)

74% (2002)

61% (1998)

65% (1996)

60% (2007)

63% (1984)

67% (1996)

68% (2006)