66% (2009)

76% (2002)

78% (2003)

72% (2011)

71% (1998)

69% (2005)

66% (2006)

64% (2003)

71% (2000)

63% (2000)

58% (1992)

70% (2013)

70% (2000)

62% (2009)

44% (2005)

54% (2007)

46% (2010)

58% (2005)

50% (2007)

58% (2004)