52% (1979)

31% (2004)

57% (1999)

65% (1986)

69% (2012)

67% (1991)

65% (2011)

65% (2010)

45% (2009)

56% (1968)

20% (2011)

69% (2011)

61% (1933)

60% (2009)

70% (2020)

64% (2007)

67% (2015)

72% (1952)

50% (2003)

61% (2006)