68% (1986)

58% (1988)

53% (1981)

68% (2000)

70% (1951)

64% (1983)

59% (1980)

56% (1978)

54% (1979)

68% (1932)

56% (1991)

57% (1992)

61% (1994)

73% (1964)

69% (1932)

73% (1955)

69% (1944)

64% (1969)

67% (1936)

67% (1974)