Agree, normal annual increment is 3 to 4%. Promotion would probably depends. I got 15% on one occasion and 27% on another occasion. I am not sure how it works but would think it depends on the values you bring and also market/competitor activities as well.

In my company, having a high base pay initially is important because the increment is based on percentage on base pay. So if your base is high but you get low percentage increment, you probably get more in dollar term than someone whose base is low but gets high percentage increment.