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In page Kansas City, Missouri:

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In 1940, the city had about 400,000 residents; by 2000, it had about 440,000. From 1940 to 1960, the city more than doubled its physical size, while increasing its population by only about 75,000. By 1970, the city covered approximately 316 square miles (820 km2), more than five times its size in 1940.[citation needed] Aggressively annexing the surrounding suburbs and undeveloped land spared Kansas City from the severe population loss suffered by cities like St. Louis and Detroit, similar cities which both lost over 50% of their population in the postwar era. In the most neglected neighborhoods, however, the same pattern of abandonment occurred and left behind massive numbers of vacant lots and abandoned homes, especially in the areas east of Troost.