I keep seeing discussions about this so let me try to explain it as simple as possible.
The main overall AI list that has been used for decades is also known as Mediabase Quick Cut Data. It is the total AI a song gets from all formats
excluding Spanish/Latin ones.
http://kworb.net/airadio is the same thing but includes the Spanish/Latin formats. However, it is made by counting the
top 50 of each format, so for example if a song is #51 on Pop with 3 million AI, it is not counted.
http://kworb.net/aipradio also adds up the top 50 of each format but it uses
published panels (subsets that better represent the format).
To get the
best estimate for Billboard Radio Songs you should use
http://kworb.net/aipradio and divide by 1.175.
For songs that don't have a lot of AI (basically anything outside the overall top 20) it is best to
use the traditional list.