78% (2002)

70% (1997)

76% (2003)

78% (2008)

66% (1999)

65% (2005)

70% (2009)

70% (2002)

66% (2001)

65% (2006)

65% (2003)

67% (2004)

75% (2004)

61% (2000)

62% (2001)

57% (2001)

72% (2008)

70% (1996)

71% (2013)

63% (2010)