bioaviliolity, what is that? You mean bioavailability?
Smoking is automatically 100% (absorbed by capillaries/arteries in lungs, passes directly to brain -THEE fastest high), intraveneous is 90% (it must pass through liver and heart before entering brain), rectal 75% ,intranasal is around 50%, with sublingual being 30% and oral 20%
You get much more out of the drug when snorting than injestion, injestion is slowly released into blood stream so the effects last longer