I think that this article can be useful, or even this one:

http://www.ncbi.nlm.nih.gov/pubmed/11753590

The body weight distribution on the sole of the foot could vary in different postures. By default, we assume that the subject is made to stand on a level area with field of vision at 90 degree with respect to the floor. Then, the center of gravity of the subject will be aligned with the heel region of the foot. Thereby, most of the body weight will be concentrated at the heel region, then metatarsal region and the toes.

Sorry, for not providing the quantitative result for the question asked.

Regards,

S.Sivanandam

REsearch information about the foot sole can be found online... in the following open Access journal

http://www.jfootankleres.com/

This question has many answers. The pressure on the foot sole varies in standing and walking. It is different in the different regions of the sole even during the rolling of the foot when one steps forwards. In standing position the greatest pressure is distributed on the heel , head of first metatarsal and head of fifth metatarsal . These are the classic support points of the foot described by E. Haas some 90 years ago. Since that time the statics and dynamics of the foot is comprehensively studied and you may find abundant propedeutical literature on this topic.

Oldies but goldies :)

Article Pressure Distribution under Symptom-Free Feet during Barefoot Standing