You're getting pretty close to 100%.
I know most illegals really do commit other crimes besides being here illegally ---or are accessing government services right and left especially the ones who bring their entire families here. But there are a few like some domestic workers and some farm workers who would be pretty difficult to deport without going door-to-door to find them, they might work for cash and leave their families back in Mexico and aren't the main problem ---but that doesn't stop us from deporting the moochers and criminals ---what's wrong with resolving 90% or 95% of the problem? It doesn't have to be 100% or 0.