68% (1952)

64% (1996)

74% (1964)

68% (1979)

41% (1947)

79% (1988)

70% (2010)

69% (2005)

44% (1999)

0% (2003)

30% (2001)

69% (1975)

51% (2003)

42% (1991)

55% (2011)

32% (1997)

79% (2014)

0% (2013)

71% (1990)

45% (1985)