64% (2007)

44% (2001)

75% (2012)

60% (2005)

73% (2010)

58% (2007)

72% (2004)

56% (2012)

45% (2013)

69% (2008)

62% (2011)

51% (2010)

68% (2011)

66% (1992)

63% (1985)

62% (2003)

70% (1989)

63% (1999)

67% (2013)

44% (2000)