Regarding the letter requesting information about the breakdown by mints of the 1965-67 and other "anonymous" coinages, nearly all of this information is already in print. You illustrated the 1967 Annual Report of the Director of the Mint, and that does include a complete table of the coins produced at each mint bearing the dates 1964, 1965 and 1966. Those of 1964 must be included, too, as coins of this date were struck into early 1966. For 1967 and later years the publication Domestic and Foreign Coins Manufactured by Mints of the United States is quite useful. The latest print edition I've seen is dated 1980. This may or may not be available online, but print copies of this and earlier editions are easily found at a reasonable cost.

I accessed these resources when writing my 1996 book The Complete Guide to Lincoln Cents. For the anonymous San Francisco and West Point coinage dated 1975-84 I also examined the Mint Director's reports for those years, and the information was included. The only wall I hit was in trying to determine the exact breakdown of bronze versus zinc and Large Date versus Small Date cents for 1982's coinage. Even the dates when the production of bronze coins ceased and that of zinc began for each mint was unclear. I found conflicting dates from various sources and ultimately just published what I thought was the most likely to be correct.

Since the 1964-65 dated coins were produced beyond those actual years (nearly all of the 1965-dated coins were struck during 1966), their story makes for interesting reading. I've written a series of columns for The Numismatist that detail both dates' breakdowns by mints and years of production. The 1964 columns were published just recently and are available online to ANA members, but the 1965 columns have already been reproduced at the NGC website:

To read the complete articles, see:
USA Coin Album: The United States Coins Dated 1965 - Part One(https://www.ngccoin.com/news/article/5343/)
USA Coin Album: The United States Coins Dated 1965 - Part 2(https://www.ngccoin.com/news/article/5409/)
USA Coin Album: The United States Coins Dated 1965 - Conclusion(https://www.ngccoin.com/news/article/5443/USA-Coin-Album/)

Tom DeLorey writes:

To read the earlier E-Sylum article, see:
QUERY: U.S. COINAGE MINTAGE FIGURES SOUGHT(https://www.coinbooks.org/v22/esylum_v22n12a27.html)