63% (2004)

61% (2003)

73% (1999)

67% (2008)

63% (1984)

65% (2009)

65% (2014)

69% (2006)

71% (1997)

69% (2006)

71% (2006)

71% (2000)

69% (1992)

62% (2011)

65% (2002)

69% (1993)

71% (1997)

75% (1994)

71% (1998)

69% (2012)