60% (1991)

51% (2001)

54% (2000)

73% (1933)

59% (1990)

59% (1978)

57% (1938)

61% (1994)

49% (2010)

65% (1960)

60% (1933)

56% (1970)

59% (1953)

69% (1944)

56% (1985)

65% (1960)

64% (1997)

59% (1996)

70% (1972)

57% (2015)