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1964 · 8.1 7.4 1.2 2500 2000 1500 500 100. o 78.5 81. 1 74.3 54. o 50 99 99 100 66.9 33. 2 4 9 3 9 100 800 600 400 200 o 00 _ 300 200 100 499 299 199 100 250 499 249 100 499 30 49
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