If you note here, there also seems to be cost of living adjustments just like you would find in tech centers as well, so California and New York averages seem higher. A lot of Electrical work is also unionized, so I don't know if that is a factor in any of this, but it seems like some tech workers seem to think unionization is better so there's that. The IBEW (http://www.ibew.org) for example seems to claim their workers on average make 37.69/hr which is right at 75k. The statistic is a bit outdated, but if anything it remained flat, if not slightly increased.
That sounds like 75th percentile is $71k. The IBEW number is more convincing (I also can’t imagine it’s gone down since 2016).
I still have to wonder how much of that is location dependent. $71k in most parts of the Midwest is quite comfortable. In the most expensive urban areas, it’s “livid with 5 roommates and never being able to save much” levels. It would be good if some of these stats were broken down by region, at least, if not MSA.