Which are the most common byte values across the 12,450 Apple II disk images?

Here is a heatmap showing the rank of each byte value. Note this is the rank, not the frequency.

The top 16 byte values (most common to less common) are:
00 20 A0 FF 80 01 7F D0 03 8D 02 AA 30 A9 3A 22 ...

The bottom 16 byte values (more common to least common) are:
... 93 5C 7D 9C 5E DC 92 DE 9A 7B 97 DA 7A 8B 5B 9B

It will be fascinating to see if this varies on other platforms and also by disk category (e.g. games vs others).