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

The present line graph illustrates the number of residents living in three different countries, namely Colombia,

Yamhill

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, and

Washington

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.

This

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survey includes the years between 1940 and 2000. In general, throughout the entire period, the population of

Washington

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remained the highest among the others. In 1940, the number of people living in

Washington

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accounted for 75,000. And, in the following 30 years, we saw an upward trend. It reached approximately 125,000. During

this

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period, the other two

also

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rose the same percentage together. The populations of

Yamhill

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and Colombia made up around 30,000 and 20,000 in 1940, respectively, but because of changes, both reached 35,000 and 45,000 in 1970, which is remarkable. Turning to the

last

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30 years, the number of residents of

Washington

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experienced dramatically high growth, from 125,000 to 250,000. Looking at Colombia and

Yamhill

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, their populations

also

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showed slow growth. The Columbian people justified 75,000,

while

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the residents of

Yamhill

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clarified 90,000 in the

last

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year, 2000.