Ok. In general though, transsexual women don't have as much as genetic females or their sisters or mothers. Could be due to several factors, underdosage, low growth hormone levels, advanced age vs puberty, genetics (XY), or perhaps just looks smaller because of our larger chests in most cases??
In any event, be glad things are growing right now. Enjoy...and time will tell how much you end up having.

Let it be known that this range you talk about is very wide, ranging from 20-30 pg/ml to up to 600 pg/ml. Levels go higher during pregnancy. And that those same women you are comparing yourself with had much higher growth hormone levels when they developed and feminized so may have needed much lower levels.
Injectables tend to give much, much higher levels...and levels fluctuate quite a bit, from very high on days 1-2 to significantly lower after 7-8 days in most. When will your blood be drawn? Because taking level at only one point in time is far from reflecting average levels, many blood tests would have to be taken at different times...
Taking estradiol cypionate, estradiol valerate?