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Take a Look at the Data from Mexico
This bar graph shows the data scientists have collected since 1994. It shows the estimated size of the monarch population in Mexico every year. The area covered in monarchs is measured in "hectares." One hectare is 2.47 acres, about the size of two and a half football fields. Can you find this year's data? How does it compare to other years? Why do you think it's important to collect and study population data every year?