Its not as easy as i thought it would be. specifically im looking for fold and staple coin flips for pennies and 3 ring binder pages with 2x2 pockets to get coin collection supplies.

I jumped on the state quarter bandwagon and started collecting those. Well, I got a little more into it, and started coin collecting quarters for earlier years too. I now have quarters from the past 30 years EXCEPT for 1970, and 1975. I have not come accross these years. Is it weird and just me, or are these years rare for some reason?