81% (2018)

45% (1993)

62% (2004)

51% (2014)

71% (2011)

71% (2000)

70% (2001)

78% (2009)

67% (2015)

74% (2007)

66% (2012)

74% (1998)

78% (1988)

67% (2003)

71% (2013)

74% (2013)

30% (2004)

67% (2012)

67% (2011)

0% (2003)