63% (1936)

70% (1944)

56% (1998)

63% (1991)

63% (1996)

56% (2004)

63% (1987)

57% (1983)

53% (1985)

57% (1968)

33% (1978)

65% (1966)

46% (1983)

62% (1974)

0% (1970)

73% (1999)

56% (1979)

59% (1987)

48% (2000)

63% (2011)