70% (2011)

76% (1997)

64% (2008)

68% (1994)

71% (1999)

77% (2002)

70% (1996)

50% (2007)

51% (2013)

68% (2004)

60% (2011)

51% (2017)

71% (1992)

71% (1999)

50% (1991)

59% (2010)

59% (2004)

68% (2003)

44% (2002)

71% (2007)