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 provides information about the changing of inhabitants in three different

of

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provinces of Oregon, the USA over the

period

in question.

Overall

,

Washington

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Washington's

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population shows an upward trend among other states of Oregon over the

period

of 60 years.

While

,

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Columbia

and Yamhill had progressively

rising

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risen

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between the years 1940 to 2000. The residents of

Columbia

rose significantly from 75, 000 in 1940 to just over 120,000 in 1970. Yet,

Columbia

locals witnessed a sharp rise, from approximately 130,000 to more than 240,000 from 1970 to 2000.

In addition

, there was a gradual increase in Yamhill population, from 30 to 45

thousands

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thousand

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during a

period

from 1940 to 1970. Between 1970 and 2000 saw

a

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substantial growth in the number of people in Yamhill.

Moreover

, the number of individuals in

Columbia

climbed steadily from about 25,000 to over 35,000 within these years.

Throughout a

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A

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period

from 1970 to 2000 saw a sharp growth in the number of locals in

Columbia