How many train derailments is the statistical average? What constitutes a "major" derailment? How many buildings exploded, on average, the last 10 years ? Do you have numbers, or are you just making stuff up?
As for airliners crashing, the truth is that accident rates are such a tiny fraction of what they were even two decades ago that the few that do occur get a disproportionate amount of ink.
Some interesting stats on train accidents over four years ending in 2001: Railroad Accidents/Incidents 1998-2001