How collaborative is the OED?

[Joel S. Berson]

On another list, someone remarked:
>The OED was and to a lesser extent is a highly collaborative, highly
>edited venture.

How collaborative is it these days?  In numbers of volunteers vs.
staff?  In numbers of quotations submitted by volunteers that are
"admitted" vs. numbers from staff?  How does that compare to the old days?

Joel

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