Question on pop report Jefferson

I have a lot of Rolls of 1967-P Jefferson Nickels, they will Grade 65+ the Population on them in MS65 is 120. Now and I have 10 in that holder and in MS-66 it is 26 and I have 5 in that holder. Should I keep sending them in or keep them Raw. I know that if they are Raw, I can't get a price for them and did not know if I sent them in and the pop went up if the price will go down.Thanks in Advance.

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Edited to add: Just take a look at the price guide/pop report for coins similar in numbers. If you added 30 or so high grades to the numbers, it will no doubt go down in value. I am sitting on a few very high grade coins that I send a few every once in a while so I don't flood the market. I also know several very high registry sets that are sitting on raw coins that are equal that top pop's in their set. But they will not send them in, at least until after they sell their set for moon money.
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<< <i>Pick your best 2 or 3 and try for an MS67! >>
This sounds like the best option. If you sold your others before the population increases then you can always have more slabbed.