America by the Numbers
nytimes.com
nytimes.com
[1] Low by American standards, at least.
[2] http://www.sanfranciscosentinel.com/?p=19911
[3] http://en.wikipedia.org/wiki/Incarceration_in_the_United_Sta...
Most recent statistic I could find (on Wikipedia, I did not drill down to their source) was about 0.75% actually incarcerated. (2.4 million people)
yeah, but being on probation or parole means you're almost in jail, doesn't it?
No.
Note that you can end up on probation without ever being in jail.
(the 1.1 million knives isn't as perplexing to me 'cuz [in my mind] there's way more ambiguity around what's a "knife" than a gun).