Presidental Scholarship $$

For those that have received this in the past does it adjust for increase in tuition over the 4 years? Also, how much does tuition go up from year-to-year? For example, if someone receives 10K per year, but tuition goes up a lot each year, by senior year it might not seem like as much.
In no way am I complaining- just trying to plan and be realistic
Thanks

the letter seems to indicate a fixed amount per year, tuition will go up but not dramatically, so plan on the award not covering quite as high a percentage of costs each year, if you qualify for any need based aid - that can increase year by year