This will largely depend on the company - its size, its domain, and it will also depend on one's position within the company.

For example, the same senior C/C++/Java dev can have recurrent annual 10% raises in a larger enterprise or government outlet. He may also get irregular 20-30% performance based raises that sometimes double as retainers. While more likely to happen in a small companies, I saw it happen in larger (500+) companies too. Alternatively, he may get a year-end or a project-end bonus. finally, he can also get no increase, which is the kind of bonus favoured by the game development sweatshops.

No wonder there's no unified stats on this. How can there be.