Children and teenagers are the fastest growing group of folks being CHARGED with situations, childish pranks and teenage issues, including viewing child porn (i.e., sexting nude photos of themselves), which may ultimately require them to register as sex offenders. See "Study: Many sex offenders are kids themselves" "Juveniles are 36% of all sex offenders who victimize children. Seven out of eight are at least 12 years old, and 93% are boys, says the study by the Crimes Against Children Research Center at the University of New Hampshire."; and "Juveniles crowd Michigan sex offender registry"; and "Should Teens be Prosecuted for Having Sex?."
Fact: 93% of new sex offenses against minors are by someone known to the minor; their family, friends or acquaintances. Source: Dep't of Justice: Victim/Offender Relationships Table pg-36 "Recidivism of Sex Offenders Released from Prison in 1994." NCJ198281. Given that DOJ fact, and that, there is no way that 93% of the families, friends and acquaintances of all victims, are on the sex offender registry. Accordingly, the offender coming from the 93% would not be on the registry, instead living in society.
The Center for Disease Control, Youth Risk Behavior study (Trends in the Prevalence of Selected Risk Behaviors and Obesity for All Students National YRBS: 1991—2009. page-2 ), which shows, that, 46% of kids in high school have had some form of sexual contact; and it has been ongoing. Then using Census figures (17.27million for high school Fig-1), that means over 8,000,000 high school kids nationally are having some form of sexual contact. And that contact is most likely with another high school kid.
Hence, if Prosecutors were to convict them, and require them to register, certainly there would be more juveniles (high school ages 13-18 or so) added to the registry than adults (Currently, combined over 700,000 NCMEC Map (11-2011)). Accordingly, 'children and young people aged 13 through 19' are at a greater risk of ending up on the registry, because they are having some form of sexual contact and admit it. So sayeth the CDC Youth Risk Behavior study.