63% (2007)

72% (2004)

75% (2012)

73% (2010)

58% (2007)

62% (2011)

45% (2013)

68% (2011)

69% (2008)

56% (2012)

44% (2000)

62% (2003)

63% (1985)

66% (1992)

42% (2004)

63% (1999)

44% (2001)

63% (2001)

45% (2013)

72% (2006)