Final answer:
The type of cancer being tracked in the chart is not specified, but the most common types of cancer are mentioned in the information provided.
Step-by-step explanation:
The type of cancer being tracked in the chart is not specified in the given information. However, the most common types of cancer mentioned are lung cancer, prostate cancer, breast cancer, colorectal cancer, stomach cancer, cervical cancer, skin cancer, melanoma, acute lymphoblastic leukemia, brain tumors, and non-Hodgkin lymphoma.