Jeff,
You shouldn't apply any sort of formula to the tables. They're all computed using a base algorithm that isn't linear, and in some cases have been tweaked by using doppler analysis. Simply extrapolating values based on the tables could produce a profile that is not safe. If you want to create your own custom table you should consider using one of the several custom table generators out there. Or build your own if you are so inclined. I've collected a bunch of deco related links that might be helpful if you are going the DIY route: jvilalta's deco Bookmarks on Delicious
You shouldn't apply any sort of formula to the tables. They're all computed using a base algorithm that isn't linear, and in some cases have been tweaked by using doppler analysis. Simply extrapolating values based on the tables could produce a profile that is not safe. If you want to create your own custom table you should consider using one of the several custom table generators out there. Or build your own if you are so inclined. I've collected a bunch of deco related links that might be helpful if you are going the DIY route: jvilalta's deco Bookmarks on Delicious