What are the category values for Body Fat?

Body fat consists of essential body fat and storage fat. 
Essential body fat is present in the nerve tissues, bone marrow, and organs (all membranes), and we cannot lose this fat without compromising physiological function.
Storage fat, on the other hand, represents an energy reserve that accumulates when excess energy is ingested and decreases when more energy is expended than consumed.

Males

Classification	Age	Body Fat %
Below Ideal	18 to 34 years	0.0% to 7.9%
Ideal	18 to 34 years	8.0% to 22.0%
Above Ideal	18 to 34 years	22.0% and above
Below Ideal	35+ years	0.0% to 9.9%
Ideal	35+ years	10.0% to 25.0%
Above Ideal	35+ years	25.0% and above

Females

Classification	Age	Body Fat %
Below Ideal	18 to 34 years	0.0% to 19.9%
Ideal	18 to 34 years	20.0% to 35.0%
Above Ideal	18 to 34 years	35.0% and above
Below Ideal	35+ years	0.0% to 24.9%
Ideal	35+ years	25.0% to 38.0%
Above Ideal	35+ years	38.0% and above

Source: Dr. Timothy Lohman, Department of Physiology, University of Arizona. “Human Body Composition”.