67% (2005)

64% (2000)

73% (2002)

63% (2004)

67% (2008)

65% (2000)

60% (2007)

65% (2005)

65% (2004)

62% (2011)

64% (1993)

75% (1999)

73% (2000)

69% (1991)

65% (2009)

61% (1999)

71% (1998)

73% (1999)

63% (1984)

65% (2002)