Let's use the 1991 $25 1/2 ounce GAE UNC because prices on ebay have gone to really high levels IMO. According to US mint figures there were 24,100 UNC coins sold/released. The total amount of proofs released was 53,125. Adding these two together gives us 77,225 $25 GAEs bearing the date of 1991 on them.
Now let me contrast them to the 2001 $25 1/2 GAE numbers. There were 48,047 UNC coins release that year and there was 23,240 proofs released for a total of 71,287 coins bearing the 2001 date.
Now either I'm onto something here because I just bought a 2001 $25 GAE UNC for just over melt and I am shopping for a 2001 proof which I believe can be had for about $390 inline with the other years. I've been told by my local coin dealer/expert that proof and UNC mintage figures should be considered differently.WHY?