The difference between the high end of the range and the low end is more than $2000 / year over 20 years can make up.
This is beyond the range stated.
Having worked for years in IT for a municipal service, our standard formula was a raise of 0% to 3% based on a performance rating, with 0% being "you're on a PIP and going to be fired soon" and 3% being a top-performer.
This is speculation at this point - but I would assume NYC works against a similar system.