I don't believe our data are in conflict. I'm suggesting that, on average, there is 1 white front for every 6 gray fronts (1 in 7 total). If there are less of 171-190 (which I believe), there are less of BOTH gray front and white front versions.
Perhaps I misunderstood your comment. (I really do have too much time on my hands.)
Bill
Last edited by flkersn; 03-24-2020 at 02:22 PM.
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