Is There Any Way to Tell How Many "Attempted" Crossovers Were NGC?

I know there are online statistics for how many coins were attempted to cross from one TPG to PCGS, but how many of those coins were ANACS and ICG? Wouldn't grades from these 'lesser' TPG's skew the results?
Are there any stats on how many NGC coins, specifically, were attempted or successfully crossed to PCGS?
And how high do you think the success rate would be? Instead of ~40% for all TPGs, do you think it would be more like 50%? 60%?
Just a thought
Are there any stats on how many NGC coins, specifically, were attempted or successfully crossed to PCGS?
And how high do you think the success rate would be? Instead of ~40% for all TPGs, do you think it would be more like 50%? 60%?
Just a thought

Lurking and learning since 2010. Full-time professional numismatist based in SoCal.
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Just a guess.
Lance.
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My sets: [280+ horse coins] :: [France Sowers] :: [Colorful world copper] :: [Beautiful world coins]
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I wouldn't be surprised if they're all fairly close.
Lance.
In the end crossing coins is just a revenue tool. What would it matter?
Out of 11 coins I crossed this year, only 4 didn't get CAC stickers (for whatever reason).
Not earth-shattering, but a data point nevertheless...
<< <i>And while we are at it, a list of cert numbers that did not cross.
25250806
25250807
25250808
25250809
25250810
25250811
25250812
25250813
25250814
25250815
The more qualities observed in a coin, the more desirable that coin becomes!
My Jefferson Nickel Collection
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