It’s there:
“Supplementary notes
Forcible rape, as defined in the FBI’s Uniform Crime Reporting (UCR) Program prior to 2013, was the carnal knowledge of a female forcibly and against her will. Attempts or assaults to commit rape by force or threat of force are also included; however, statutory rape (without force) and other sex offenses are excluded.
*The FBI revised the definition of rape in 2013. The new definition is as follows: “Penetration, no matter how slight, of the vagina or anus with any body part or object, or oral penetration by a sex organ of another person, without the consent of the victim.””