National averages are 2.3% and 6.3%.
https://mississippitoday.org/2020/10/19/study-11-of-all-miss...
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While there are both legal and legislative attempts to change it, as of now:
Mississippi currently has no provisions for re-enfranchising those with a past felony conviction, other than by a direct act of the legislature or governor for that specific individual (which is very rare).
Steal $1,001 of stuff when you're 18 and you'll likely never get to vote again in your life even if you never have another encounter with the wrong side of the law.