I accept the downvotes; I don't think that, I know it. Notice that "a lot" doesn't mean "over 50%", it can also mean "too much for comfort".
http://www.motherjones.com/mojo/2013/09/private-prisons-occu...
> We are living in boom times for the private prison industry. The Corrections Corporation of America (CCA), the nation's largest owner of private prisons, has seen its revenue climb by more than 500 percent in the last two decades. And CCA wants to get much, much bigger: Last year, the company made an offer to 48 governors to buy and operate their state-funded prisons. But what made CCA's pitch to those governors so audacious and shocking was that it included a so-called occupancy requirement, a clause demanding the state keep those newly privatized prisons at least 90 percent full at all times, regardless of whether crime was rising or falling.
> Occupancy requirements, as it turns out, are common practice within the private prison industry. A new report by In the Public Interest, an anti-privatization group, reviewed 62 contracts for private prisons operating around the country at the local and state level. In the Public Interest found that 41 of those contracts included occupancy requirements mandating that local or state government keep those facilities between 80 and 100 percent full. In other words, whether crime is rising or falling, the state must keep those beds full.
http://www.huffingtonpost.com/donald-cohen/lockup-quotas-low...
> In 2012, Corrections Corporation of America (CCA), the largest for-profit prison company in the country, sent a letter to 48 state governors offering to buy their public prisons. CCA offered to buy and operate state prisons in exchange for a 20-year contract, which would include a 90 percent occupancy rate guarantee for the entire term. Essentially, the state would have to guarantee that its prison would be 90 percent filled for the next 20 years (a lockup quota), or pay the company for unused prison beds if the number of inmates dipped below 90 percent capacity at any point during the contract term (a "low-crime tax" that essentially penalizes taxpayers when prison incarceration rates fall).
I can't prove that this is related to the private prison industry. But I'm not buying for one second the sudden sharp rise was caused by suddenly increased vengefulness, either. So what gives?
https://www.google.com/search?q=us+prison+population+graph