I'll see if I can Google it, maybe someone else could too.
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Okay, here we go, straight from Wiki;
"Some (but not all) states publish statistics indicating how many people acquire permits to carry concealed weapons, and their demographics. Reported permit-holders are predominantly male. For example, while over 60,000 women were licensed in Florida as of June 2007, 85% of permit holders were male in that state.[45] The number of permit-holders has been growing. Michigan, for example, reported more than 40,000 applications in a one year period.[46] Florida has issued over 1.2 million permits since adopting the law, and has had more than 400,000 currently-licensed permit holders as of June 2007.[47]
Distribution by age is generally proportionate to the overall state adult population. In Florida, 26% of permit-holders are in the 21–35 age group, 36% are 36–50, 27% are 51–65, and 11% are over age 65. The numbers of permit revocations are small. North Carolina reports only 0.2% of their 263,102 holders had their license revoked in the 10 years since they have adopted the law.[48]
Permit holders are a remarkably law-abiding subclass of the population. Florida, which has issued over 1,346,000 permits in twenty years, has revoked only 165 for a "crime after licensure involving a firearm," and fewer than 4200 permits for any reason. [49]"
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Now, the couple things I put in bold is as close to what I found to a "problem" with with CCW carriers. i.e. Them doing something stupid or shooting someone who doesn't deserve to be shot.
(I think I might actually buy the book the second Wiki link is about, it has the stats in them).
Link to Wikipedia
Link to Wikipedia: More Guns, Less Crime