67% (2008)

65% (2017)

73% (2013)

60% (2009)

73% (2015)

72% (2011)

78% (2010)

59% (2010)

61% (2014)

66% (2010)

58% (2006)

62% (2009)

58% (2003)

59% (2010)

55% (2007)

70% (2007)

59% (2005)

62% (2001)

50% (2011)

48% (1999)