Final answer:
The provided references do not directly answer the specific question about the percentage of people who drop out of an exercise program in 6 months. Health studies or statistical reports would be required to provide a factual answer.
Step-by-step explanation:
The question regarding the percentage of people who drop out of an exercise program within 6 months is not directly answered by the provided references. However, it is a health-related question that might involve statistical data in a real-world scenario. The additional information provided relates to different statistics, such as the regular exercise habits of students, the legislative systems of countries, and weight loss among individuals on a specific program, but does not give a specific answer to the asked question. To give a factual answer, one would need to refer to current studies or reports on exercise program retention rates.