Not sure I understand. You're looking for what fraction of ttys were Morkrum vs ASCII-63 vs ASCII-67, & alpha vs numeric punches?
@enf Does there exist a global timeline of popular encodings for key punches vs. teletypes?
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I was thinking… 1932 ITA-2 1960 work on ASCII starts 1964 IBM 029 keypunch released, EBCDIC
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