(This index was updated on Jan. 19.)

Amendment to the U.S. Constitution that abolished slavery and involuntary servitude "except as a punishment for a crime": 13th

Amount of money the prison industry makes annually off the labor of the  900,000 prisoners who work for little to nothing: $2 billion.

Of the six states that do not pay inmates for their labor at all, percent that are in the South: 100*

Rank of Florida among the states with the highest prison populations: 3

Number of people incarcerated in Florida's prisons: about 100,000

Highest hourly pay for a Florida inmate working a regular prison job, in cents: 32

Amount Florida prisoners were paid for performing dangerous cleanup duties in the wake of Hurricane Irma: nothing

Amount a $4 can of soup costs in Florida's prison canteens, which the inmates call "highway robbery without a gun": $17

On Jan. 15, the federal holiday honoring civil rights leader Dr. Martin Luther King Jr., number of Florida prisoners expected to participate in Operation PUSH — a nonviolent strike to demand better pay, lower canteen prices and parole incentives: thousands

Date on which a group of Haitian inmates in Florida released a statement in support of the strike, saying that "prisons in America are nothing but a different form of slavery plantations and the citizens of the country are walking zombie banks": 12/28/2017

Number of strike organizers placed in solitary confinement in the days before the strike began: dozens

Number of expected Operation PUSH strike locations: at least 8

Number of days the prisoners are expected to strike: at least 30

Number of groups that have pledged solidarity to the striking prisoners: over 140

Date on which a solidarity "phone zap" is scheduled to support the strikers: 1/22/2018

Cost for Florida to hire outside companies to perform the work duties of the striking prisoners: millions of dollars

Year in which the largest prison strike in U.S. history took place: 2016

Estimated number of prisoners who took part in that action: 20,000

Number of Florida prisons where there were work stoppages as part of that strike: 4

* Alabama, Arkansas, Georgia, Mississippi, South Carolina and Texas

(Click on figure to go to source.)