55% (1982)

62% (1973)

57% (1988)

70% (1939)

61% (1975)

59% (2002)

70% (1950)

60% (1995)

59% (1956)

57% (2006)

63% (1955)

57% (1976)

56% (1996)

77% (1947)

69% (1920)

60% (1971)

58% (1975)

62% (2002)

70% (2002)

63% (1946)