Employees having 2 to 4 years of experience switch the jobs more.

Let us study the career path of an IT professional in general. Generally, people start their first job in IT industry, work for some time and look for a change afte some time. So, if you look in this way, change is triggered by a requirement. Change is an attempt to satisfy that requirement, where the reason could be...
1. Money
2. Job Satisfaction
3. Career ambition
4. Further education
5. Problems at workplace
6. Promises made by the company were not done.
7. Location preference
8. Time + Money*
9. Lack of recognition
10. I change because people around me change
11. Don't know, not because of atleast one reason above*