Typical spawn size of N. similis?

Hey all, I was wondering if anyone knew the typical spawn size of N.
similis. I had two wild females have spawns last month. One female shortly
thereafter lost a territorial dispute with a rival male (her mate was so
badly damaged I had to move him to another tank, I'd move her too except
she won't let me catch her, doesn't even dive in a shell for me to use
that trick). I was only able to save 2 fry from that batch (thank god
the rival male was too large to fit fully in the shell, although he did
try his hardest to reach the fry).

I've noticed the other female has 10 fry now that they're big enough to
accurately track and count, and that seemed a bit high to me for a
shellie. Usually in the past I've seen 5-7 fry from a similis spawn, but
I've only had a half dozen or so spawns. Anyone know if this is an
unusually high number or typical for wild similis?