according to the us hospital insurance group (not sure if thats the right name, but thats basically what it is) pit bulls are 3rd on the list of top 100 breeds for dog bites. 3rd from the bottom that is!!! german shepherds are #4 from the bottom. the top 10 are small dogs like chihuahuas, dachshunds, terriers, beagles, shitzus. labs and other breeds no one ever considers dangerous are also at the top of the list. the reason is these small dogs, and labs, goldens, etc are breeds people dont consider dangerous. its more likely for someone with a gsd, rottie, pit bull etc to keep their dog/dogs enclosed, on leash, properly socialize and train them, and supervise any interaction they have with children or strangers. if you get a tiny lap dog or (I hate to keep saying lab) a big dog thats considered a big teddy bear/sweety, your more likely to not be so attentive. so a lot of people get those types of dogs and think "oh, every (pick a sweet reputationed breed) Ive ever seen or heard of would NEVER hurt anyone, maybe lick or wag them to death." and they dont watch them closely, let them run loose, let kids play with them without supervision, etc.
also on that list its not just dog bites (mostly but not only) its also general injuries. and according to the cdc, most "dog attacks" dont result in a bite. they result in the dog jumping up to greet, the dog running up and scaring the person who then falls down and gets hurt, the dog crawls on top of them and starts licking and the person thinks they are being attacked.
according to the hospital list, the worst injuries from dog bites occur from smaller dogs who grab on and dont let go, resulting in flesh being torn rather than just punctured.
regardless of what breed you have, and where it currently lands on any list, properly train and socialize your dog, keep it on a leash in public unless you are CERTAIN that it will obey no matter what, and closely supervise ALL interaction with children, strangers, friends, etc.