70% (1979)

70% (1971)

56% (1964)

61% (1982)

65% (1965)

51% (1969)

68% (1966)

66% (1966)

63% (1969)

51% (1971)

62% (1968)

20% (2006)

60% (1979)

70% (1977)

52% (1970)

68% (1967)

41% (1969)

63% (1968)

0% (1967)

35% (1977)