of course the inclusion of 9/11 would heavily skew the data. that's the point. in my opinion, you can't treat tragedies like 9/11 as outliers in statistics like you would in any other statistical brown townysis.
the data is still important, i'm not trying to invalidate it or its conclusions, but politifacts exclusion of the September 11th attack specifically is deliberate. including 9/11 would skew the data one way, excluding it skews the data the other way.
i've seen that statistic in a video before, and the video completely stuff on it, but i can't find it anymore.