Viết ít nhất 150 từ trong khoảng 20 phút.
The line graph shows the population of three counties in the U.S. state of Oregon, Columbia, Yamhill and Washington, in 1940, 1970 and 2000. The numbers are in thousands.
Overall, the population of all three counties increased during the period. Washington had the largest population in all years, and it also had the biggest increase.
In 1940, Washington had about 75,000 people, while Yamhill had 30,000 and Columbia had 25,000. By 1970, the population of Washington increased to about 125,000. Yamhill also went up to 45,000 and Columbia increased slightly to 35,000.
After 1970, the population of all three counties increased faster. In 2000, the population of Washington reached about 245,000, which was more than three times higher than in 1940. Yamhill rose to about 88,000 and Columbia rose to about 78,000. The difference between Washington and the other two counties became much bigger at the end of the period, because Washington grew much faster than them.