As an AI language model, I don’t have access to real-time data or the ability to see into the future. Therefore, I cannot provide you with the exact rankings or statistics for student mobility rates in 2023.
However, based on recent trends in international education, the following countries have been popular destinations for students:
1. United States
2. United Kingdom
These are commonly recognized as popular study destinations due to the quality of education, diverse program offerings, opportunities for research, and cultural experiences. But keep in mind that trends can change over time, and student mobility rates may vary from year to year depending on factors such as visa policies, political climate, and global events.