64% (2000)

75% (1996)

59% (2001)

75% (2005)

69% (2007)

70% (1996)

65% (2011)

60% (2003)

65% (1997)

55% (2006)

76% (1994)

49% (2013)

69% (2007)

72% (2014)

60% (2000)

67% (2007)

57% (2002)

59% (2001)

57% (2016)

71% (2009)