The graph illustrates the number of residents of three counties in the state of Oregon during the years 1940, 1870 and 2000.
Overall, the data shows that the population of Oregon is growing, and while washington showed a large change over time, that of Yamhill and Clumbia have been steady and similar to one another.
In 1940, the majority of people live in Washignton, which accounted for 75,000, and by 1970, this number rose significantly to over 120,000. On the other hand, Yamhill and Columbia had around the same number of residents in 1940, at 30,000 and just below 30,000, respectively. Then, by 1970, these figures increased steadily to 45,000 and around 33,000, respectively. Making washington more than twice as populated as the other two counties combined.
In 2000, the number of people living in Washington soared to over 240,000, while that of Yamhill and Columbia grew at the same rate with one another, and reaching around 90,000 and a little over 75,000.
