Did You Mean By Chance How Many I Wanted To Launch Over The Ocean?
If so you can readily look it up in your well thumbed copy of "The Case for Mars". Of course it would be much better if the answer was 0 because we found a source of geothermal power or got a big leap in solar cell efficiency and ease of production. That way all the people who can't grasp relative risk won't have anything to panic over.
Regards,
Mark
