75% (1962)

57% (1992)

59% (2014)

74% (1964)

68% (2005)

54% (2014)

65% (2015)

60% (2005)

53% (2000)

64% (1996)

42% (2004)

50% (2009)

69% (2012)

80% (1999)

70% (1995)

63% (1993)

34% (2007)

54% (2015)

36% (1947)

79% (1988)