99.2% of ATMs levy a surcharge on users who are not account holders. The amount of the surcharge for non-account holders can be modeled as s(t)=0.721t0.081 dollars, where t is the number of years since 1995, data from 3≤t≤13. Calculate the average rate of change in the amount of the surcharge for non-account holders between 2003 and 2007. Write the result in a sentence of interpretation. (Round your answer to two decimal places.)