Okay, I decided to go figure it out myself. This is state's GDP per capita compared with the country with the closest national GDP per capita:
A lot of states were really, really close together, resulting in many states having the same country allocated to them.
Also, interestingly enough, the United States falls in between 12th (Minnesota) and 13th (California), meaning that the vast majority of states (38, to be exact) has a GDP less than the GDP of the whole country.
Now that is much better. 
I don't know, I don't consider it a compliment to have my state's economy compared with Italy, the closest that western Europe comes to an economic basket case.
