Nickelitus - sorry for the delayed response. Crazy busy in my world at the moment. I copied your data to post a quick response or two. Something to keep in mind is that I've done under 40 boxes so less than half of your effor. Here it goes...
*1930's - 93
38P - 15
38D - 0
38S - 0
39D - 1
39S - 0
Oddly enough, the 39D is the only one I didn't find for my primary set. I have around 10 38s and had nearly 2 rolls of 39s, but I released a roll of the worn 39s a few weeks back. Regarding the 2015 project, no 38/39 D or S specimens. For that matter my second album is shy of those specimens as well. Still, reasonable correlation on numbers.
*1940's - 1,062
42D - 5
46S - 8
48S - 6
49S - 9
Similar again on these key/semikey dates. I think I've found around half as many 49Ss, but proportionate to your numbers. Regarding total counts, I really can't say since I don't keep stats or excess coinage. Basically I build rolls of the best coins I find, periodically going through the rolls to glean out the worst for release. That said I have rolls for every year (except for the war years) that are full/partially full and if I had to guess, I have around 300 or so that I've kept. Reasonable correlation.
*1950's - 1,498
50P - 11
50D - 1
51S - 4
55P - 4
I think I've only found 4 1950s thus far, 2 1950D, 5 1951S and perhaps around 6 1955. Regarding totals, I think I've kept around 400 of the better 50s coinage. Reasonable correlation.
*Silver War - 72
42P - 3
42S - 2
43D - 3
44D - 3
44S - 2
45S - 4
I think I've found a little more than half your number but most tend to be P mint items. However, I've found similar numbers on the dates you posted, so maybe I'm doing alright here on the East Coast with the Ds and Ss.
*Liberty V - 2
1900 and 1905
I've done unreasonably well here. I forget how many I have now but all were found CRH. 7 came a few weeks back out of a single box, 1887 being the oldest. Maybe I have 18 or 21?
*Buffalo - 35
9 - With Dates
26- No Dates
Again, I've done unreasonably well here. I found nearly 60 so far this year. Twice I found 26 in a box (one of those had the 7 Vs). Most with dates. Maybe 14 without dates this year?
*2009's - 29
11P and 18D
Around 20 P and around 10 D here in the east.
*Henning - 0 confirmed, have many suspects to check
*Proof's - 9
0 Henning as well but maybe around 15 Proof and a couple SMS coins.
*Errors - 194 winter day project
*AU/BU - 650 winter day project
Hard to say on the Error (or Variety) coins. I search for both and I've found a few nice clashes and several DDRs. I've also kept rolls of AU/BU specimens. On the first good box of the year I pulled 300+ AU/BU 60-64 P and D (along with 26 Buffalo).
*USA Dimes - 33
*USA Cents - 32
Not sure on the count, but less in my estimation. Not even half that in my searching.
*Foreign Objects
Batteries - 2
Metal Slug -2
Metal Washer -2
Plastic Play Coins - 3 - 1 cent, 1 nickel, 1 dime
No batteries, but the rest I have including the
Magician's coin.
*Foreign Coins 20 Different
Canada - 921 - Working on set
Bahamas - 11 - 10 Pineapple, 1 Starfish
Mexico - 8
Bermuda - 5
Switzerland - 4
Republic De Chile - 3
Germany - 3
Grand Cayman - 2
Dominican Republic - 2
Great Britain - 2
Ireland - 1
Ecuador - !
Japan - 1
China - 1
Jamaica - 1
Barbados - 1
Taiwan - 1
Israel - 1
Singapore - 1
Norway - 1
I'm not sure about Ireland, but the rest I've found too. Going through my finds the other night, I realized that I have a 1915 Gold Ducat. I thought it was 'gold-like' but now I'm thinking it's the real deal. How about that find for a nickel? Online research suggests $120-150. I need to get that coin authenticated tomorrow.
As for the 2015 Jefferson project, the first 90% got done in a hurry. If I wasn't concerned I'd say folks could put that together in 5 boxes without much trouble. I took 9 to get the better/best grades for the more common dates. Then another 7 to get the next 3%. Tougher going now as you might suspect. For the project, I'm missing the following (to my recollection):
1938 D and S
1939 D and S
1942 P
1943 D
1944 D and S
1945 D
1946 S
1949 S
Can't think of #12 off the top of my head, but I know it's 12. I think that I'll find 2-4 more by the end of the year. I only average a box every 2 weeks or so. In the next 10 boxes, I might get the outstanding dates to around 8. The tough dates are....tough...but not impossible. Location helps as I see the West Coast folks finding the harder S mint dates with far greater regularity than we folks in the East. But it's a fun challenge with great satisfaction and reward.