The 2015 annual statistical report from the National Human Trafficking Resource Center (NHTRC). The following information is based on incoming signals made to the NHTRC from January 1, 2015 – December 31, 2015 about human trafficking cases and issues related to human trafficking in the United States and U.S. territories. Signals refer to incoming communications with the NHTRC and can take the form of phone calls, online tip reports, or emails. Signals regarding topics unrelated to human trafficking are not included in this report. In 2015, the NHTRC received a total of 24,757 signals nationwide.