Anniversary appraisal

I need the details on how many years TCS gives anniversary appraisals. I have been working more than 3 years and I have got the 1st years, 2nd years and also 3rd year anniversary appraisal. So in total after how many years I will receive again? Or I will receive an anniversary appraisal every year?

Do not get confused with the project appraisal which we get after march every year. I am talking about appraisal which we get in the joining month of TCS.