{{ content | trim }} You must carefully examine the chart and the question. First redraw the image using Python code. This code should aim to focus on data accuracy and basic chart type representation. The code must be runnable. Before any plotting, import pandas and construct one `pandas.DataFrame` named `chart_data` that contains all raw numerical data you will use. The DataFrame must include appropriate column names and keep the original row order. Then describe your step-by-step thought process and answer the question using a single word or phrase and put it under format \\boxed{}.