On this US map, what do the numbers on each state actually represent?

What do the numbers mean for each state?
What do the numbers mean for each state?

Here's a map of the United States. Each state has a number associated with it. But, to what do the numbers refer? Answer to be revealed in a couple of days.

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Think in terms of "dollars per - - - - - - - -"
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Ok, here it is. These are 2022 stats, the last year where there is complete information for the whole country. These costs represent- allegedly- the annual cost of keeping an inmate in prison for one year. ( Kind makes you wonder what the accommodations are in Massachusetts. ) Thank you to everyone who took a shot at this.
On this US map, what do the numbers on each state actually represent?
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