How many wheats left in circulation?

Here is a question I have often wondered. How many wheats are in circulation still? First we need to know how many cents/pennies are in circulation. Here is one estimate

http://www.kokogiak.com/megapenny/twelve.asp

So, 200 billion pennies. How many are wheat cents? Since Jan 1, I have searched 384 dollars of pennies. That is a little over 15 boxes or 38,400 cents And in those boxes and rolls I found 57 wheat cents

So the math works like this.

That is one wheat per 673.6842105 cents searched. Using 200 billion as the base that tells us that there are 296,875,000 wheats left out there to be found.

Total wheat production from 1909 to 1958 was 25,789,366,876.

That means that 1.151% of all wheat production is still at large!

Happy hunting.

OK, I know that this is full of holes, but I bet it its you thinking.

Additional info

Of all those boxes, 4 total boxes were totally void of pre 1982 cents. They were presorted of copper cents but I included them anyway

If I included boxes search three years ago the total would be higher. My last several boxes hardly have any wheats as they seem to be going away.