http://en.wikipedia.org/wiki/Prisons..._United_States
The United States has 5% of the world's population and 25% of the world's incarcerated population.
In 2002, 93.2% of prisoners were male.
A survey showed that among the
nearly 300,000 prisoners released, 67.5% were rearrested within 3 years, and
51.8% were back in prison.