The graph shows the estimated population , in thousands, of a town years since 2010. Which of the following best describes the increase in the estimated population from to ?
The estimated population at is 0.8 times the estimated population at .
The estimated population at is 1.2 times the estimated population at .
The estimated population at is 1.5 times the estimated population at .
The estimated population at is 2 times the estimated population at .