67% (2008)

78% (2010)

62% (2014)

73% (2011)

73% (2013)

66% (2017)

66% (2010)

58% (2006)

73% (2015)

60% (2009)

59% (2010)

58% (2003)

59% (2010)

62% (2009)

55% (2007)

70% (2007)

61% (2000)

59% (2005)

50% (2011)

48% (1999)