Here are 11 example cases used by the study you cite. In some cases, the child was never in any danger at all, they were just “concealed” (the study’s words) from their parents. Also, many of the cases recount episodes of acquaintance rape of teenagers, not small children being approached by perverts, like you’re saying the numbers show.
A 17-year-old girl’s ex-boyfriend forced her from her parked car, threw her into his car, and took her to a shopping mall parking lot where he detained her by force for 4 hours. The girl’s mother became alarmed when her daughter’s employer called to see why the girl had not shown up for work. Upon receiving the call from the employer, the mother drove to the girl’s workplace, saw her abandoned car, then called the police to locate the missing child. (Caretaker and reported missing)
A 14-year-old boy was hunting in a park when a strange man appeared, claiming that the boy was trespassing on his property. This was not the case. Nonetheless, the “property owner” detained the boy at gunpoint and forced him to remove his outer garments to see if he had any weapons other than his shotgun. Then, the “property owner” forced the boy into the woods at gunpoint. When the boy did not return home on time, the caretaker became alarmed and tried to find him. When the boy returned home, the police and the park warden were contacted. (Caretaker missing)
A 4-year-old boy was taken on a 20-mile joyride by the schoolbus driver after the rest of the children had been dropped off at their homes. No force or threat was used to transport or detain the child; however, the bus driver concealed the child’s whereabouts. When the child did not come home at the usual time, the alarmed caretaker called the school and bus company to locate the child. Then, upon finding out where the child was, the caretaker contacted the police to recover the child. This episode lasted 7 hours. (Caretaker missing)
A babysitter refused to let three children, ages 4, 7, and 10, go home until she was paid for prior babysitting. The babysitter detained the children against their will and did not allow the alarmed caretaker to contact the children because she did not answer the phone. When the babysitter finally answered the phone, she lied, telling the caretaker that the children were on their way home. The caretaker called the police to recover the children from a known location. (Not missing)
A 17-year-old girl was on a date with a long-term acquaintance (a 17-year-old boy) who took her in a car to a dark, secluded area on a mountain, where he tried to rape her. The girl was detained by force and sexually assaulted. In this case, the caretaker was not concerned nor did she call the police because she figured the girl would come home. (Not missing)
A 13-year-old girl was hanging out with “bad kids” (according to her caretaker) and grabbed by a 17-year-old male friend (not a romantic friend) who tried to sexually assault her. The perpetrator used threats and force to take her to his home, where he used force to detain her. The police were called for a reason other than to locate or recover the child. (Not missing)
A 9-year-old girl was lured into the perpetrator’s camper trailer with an offer of candy. The perpetrator, a 35-yearold male, detained the child by force in the trailer for an hour while he sexually assaulted her. The police were called for a reason other than to locate or recover the child, and the perpetrator was arrested. (Not missing)
A 15-year-old girl was lured by a friend into the hallway at school, then pushed 25 feet into the boys’ bathroom by some older boys who detained her by force and sexually assaulted her before she managed to escape screaming. The school contacted the police to report the crime and the boys were arrested. (Not missing)
A 10-year-old girl was lured with candy and money by an 85-year-old male neighbor and long-term acquaintance into his home, where he sexually assaulted the child. The caretaker did not contact police because she said she had no concrete evidence and the child was not injured. (Not missing)
A 17-year-old boy was with a very recent male acquaintance at the perpetrator’s home. The perpetrator detained the boy for an hour by force and sexually assaulted him. The police were not called because the caretaker did not find out about the episode until more than a year later. (Not missing)
A 17-year-old girl was forcibly detained and sexually assaulted in a parking lot at a football game by a 25-year-old male who was an ordinary friend and long-term acquaintance. The police were not called because the girl did not tell her parents. The respondent in this interview was the victim’s older sister. (Not missing)
http://www.missingkids.com/en_US/documents/nismart2_nonfamily.pdf
In closing: The study does not say what you think it says.