75% (1973)

45% (1971)

51% (1966)

62% (1968)

49% (1965)

63% (1966)

63% (1969)

72% (1972)

60% (1967)

69% (1973)

54% (1964)

59% (1969)

51% (1968)

43% (1968)

57% (1964)

0% (2006)

64% (2008)

56% (1965)

60% (1966)

52% (1971)