The graph below shows the population change between 1940 and 2000 in three different counties in the U.S. state of Oregon.

The line graph presents the total number of residents in three counties in the state of Oregon between 1940 and 2000, measured in thousands.

Overall

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, all the districts showed an upward trend, with Washington consistently recording the largest population over the period. Regarding Washington, the population rose sharply by around 55 thousand over the three decades, standing at more than 120 thousand in 1970.

This

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figure continued to grow and peaked at approximately 245 by the end of the period, representing a significantly different number.

On the other hand

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, the two remaining counties had a small gap during the entire period, with Yamhill slightly higher than Columbia. Yamhill’s population increased modestly from 30 in 1940 to roughly 45 in 1970 before climbing

further

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to 90 in the final year. A similar pattern was

also

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seen in the District of Columbia, rising from about 20 in the initial year to just over 75 by 2000,

although

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it remained the least populous among the three.