Greetings!
According to the published service information for this vehicle, the timing belt should be inspected for wear every 40,000 miles (and be replaced if deterioration is noted). There does not seem to be any mandatory fixed replacement interval for the timing belt in any of the maintenance recommendations for this model.
That being said, my own personal advice is if you are approaching 100,000 miles on the original belt, I would give serious consideration to changing it for maintenance reasons. Better to change it sooner, at a convenient time for you, than unexpectedly when you cannot afford to do without the vehicle. Rubber components do not last indefinitely, and they never break at convenient times...
I hope this is helpful; if so, an accept would be most apreciated! thanks!