it would help if you gave us the stock rim size for the 99' I'm sure that there are a few guys/gals here that have it memorized for every make and model honda but I'll bet 70-90% of us don't .
but the short answer. offset changes with rims size.
ie. my stock wheels on my crx which are 13" for which I'm not 100 % sure of the offset but I think it's about +30-35mm
the rims I have on my car are 15" x 6.5" rims with a +40mm offset.
and for a set of 17's I'd prolly have to use a +42mm offset.