76% (2006)

80% (1995)

65% (2000)

71% (2002)

62% (2009)

65% (2006)

65% (2007)

69% (2013)

49% (1997)

71% (1994)

71% (2001)

59% (2000)

65% (1992)

54% (2000)

62% (2007)

58% (2007)

54% (2010)

66% (1993)

59% (2011)

61% (1997)