57% (2001)

46% (2007)

58% (2013)

62% (2011)

53% (2011)

61% (1973)

69% (2015)

60% (2015)

42% (2014)

57% (1981)

70% (1942)

73% (1979)

50% (1973)

41% (1996)

66% (1995)

48% (1937)

52% (1997)

67% (2005)

51% (2015)

31% (1999)