It's based on FBI background checks. The next time the FBI issues gun crime statistics I want you to question it as well.
I wonder if it only includes background checks for weapons purchases or if it includes background checks for concealed carry permits, as well? I am an Illinois resident and in 2021 I have applied for CCL/CCW permits in 5 different states (so far). If the FBI counts each of those background checks based on my Illinois address then the numbers will be skewed higher. Since Illinois' carry permit is not reciprocal with so many states, people that get a resident CCL in Illinois often get 1 or 2 non-resident CCLs in other states to be able to carry in the max amount of states that they can.