It peaks between the ages of 2 and 4. Just ask any parent.
It's not clear what your question means and I'm tempted to think you meant it to read, "human energy field".
If that's what you meant it's what Franz Mesmer called "animal magnetism", what mystics call "the human aura", and what Ari Leonard said was the stuff from which gods were created.
If that was your question then my answer would be, "Quite a lot. If you weren't anonymous I'd consider sharing it with you."
That I seem to never have enough.
Dear Anonymous,
I was about to pass over your Q when I noticed Didge's answer for you... There are actually many people on this site, me included, who could give you good information. However, it is difficult without seeing perhaps your profile, your history, maybe more background to the question.
You are receiving answers (understandably) a bit flippant...a suggestion for you, as soon as you feel comfortable, do come back with more information, both about yourself and your question, and give us a second chance?