Granted, these numbers do sound small, but it's good to remember that they represent an average. If you are given a raise that's larger than this, these numbers might not be necessary to mention, but if you find yourself in a position where you're being offered less than this, these numbers could be a good thing to mention, and could potentially get you to a higher amount than you were initially being offered. Again, it will depend on your situation, but familiarizing yourself with and utilizing numbers is always a good idea.