I think they are increasing among teenagers. There are many troubled teens out there who are not getting the kind of attention they need. Some of them have mental problems and even though they may have been diagnosed, no one really monitors them to see whether they are taking their medications or help them get the therapy they need. Another reason is the ease with which anyone can purchase a gun, any type of gun, nowadays - no background checks, no waiting period, nothing. They just go out and buy it as they would buy a video game. And don't get me started on that one!