From MiniPro Community Wiki
There're currently approximately 13000 supported chips. List is available on the official website MiniProSupportList.txt.
Some interesting quotes:
This shows that of the 1044 unique industry part numbers in the MiniPro list of 13137, that only 34 of 1044 unique parts are needed to account for 50% (6579 entries) of MiniPro's 13137 entries .
The graph shows that only 157 devices are needed to account for 10003 of the 13137 entries.