The average age of entry into sex slavery for girls is between 12 and 14 years old. The average entry for boys is somewhat younger than that of girls, i.e., 11 to 13 years old.
Estes, Richard and Neil Weiner. the commercial Sexual Explotation of children in the U.S., Canada and Mexico. FULL REPORT (of the U.S. National Study) Philadelphia: Univ of Penn, Penn Social Policy and Practice. Web. 03 Aprl 2012.
 

In the United States, trafficking victims spend between 4 and 5 years enslaved.
Bales, Keven and Ron Soodalter. The Slave Next Door - Human Trafficking and Slavery in America Today. Berkley and Los Angeles: Univ of CA Press, 2009. Print