The summary overview is too short and lacking in short data reference. List the cities surveyed, the measurement used for the survey, and thin merge it smoothly into the trending statement.
Looking at the graph
If it a bar chart or a line graph? Those are 2 different image references. Be accurate at all times, do not confuse the leader with conflicting image references. It would be best not to refer to the image reference anymore after the initial identification in the summary overview. That will help avoid image confusion that can confuse the reader and lower the GRA score.
Vary the vocabulary in reference the percentage. Don't just keep using the percent sign. change it up with alternatives like ratio, proportion, or rate. Use complex comparative sentences whenever you can.