5% is normal attrition in a company, depending on the specifics it can be even higher. The difference is between people that leave on their own (good or bad) an

5% is normal attrition in a company, depending on the specifics it can be even higher. The difference is between people that leave on their own (good or bad) and shaving the lowest 5% out. In this world most companies don't have very high standards, even mid-performers can be quite bad. If you are in any way competent, you'd never have any such problems.