Need help reading success rates

Hi. Can anyone help me read these success rates for two clinics?

http://www.sart.org/clinic-pages/find-a-clinic/

One is Advanced Fertility Center of Texas and the other Houston Fertility Institute in zip 77018.

I mostly know what to look for based on the "Guide to Understanding IVF/PDG", but I can't see where they're listing the number of embryos transferred. Then there's preliminary, cumulative and subsequent outcomes (?)

Any help from a pro who knows how to read the stats is greatly appreciated! The live birth rates, from what I can tell, are in the 35-40% range. Is that normal/average/good/bad?