I should have included another category for storage/refinery accidents (although that would not have changed the answer).
I'll post the correct answer after the poll closes.
Why with the poll? What's your agenda here?
I like that currently the poll is in the image of a middle finger which is rather apropos for this agenda driven thread.
Kudos to everyone who didn't even bother to register their thoughts on the topic, but thought themselves sufficiently knowledgeable to discern my motives, nonetheless. You revealed yourselves.