48% (1996)

70% (1966)

61% (1971)

68% (1984)

51% (1954)

61% (1972)

60% (1979)

52% (1959)

61% (1994)

50% (1976)

67% (1959)

66% (1957)

68% (1963)

58% (1961)

54% (1975)

55% (1949)

61% (1969)

52% (1979)

53% (1997)

61% (1964)