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

, and

Washington

.

This

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

Washington

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

Washington

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

this

period, the other two

also

rose the same percentage together. The populations of

Yamhill

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

30 years, the number of residents of

Washington

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

Yamhill

, their populations

also

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

while

the residents of

Yamhill

clarified 90,000 in the

last

year, 2000.