...mmm.... makes me think of a saying..... something about counting chickens....... and hatching?
Seriously now, not a great amount.... maybe 5?
They look like they could do with a light feed of nitrogen - "veg/grow" nutrients, try half strength, one dose, before going back to your "bloom" nutrients. This may help the flowers grow a bit bigger.
crappy autos...... I'm not a fan of them. Really only for pros with mega light installations and probably hydro set ups/methods. Autos, in my experience, aren't all that they're cracked up to be. Had so many genetic problems, weird plants, runts, abnormal growth, crappy thin popcorn flowers .... you name it.
I saw more strange plants over 25 autos than I have ever seen in 35+ years of growing normal photoperiod plants, outdoors. I personally will not waste my time and effort growing autos ever again! Maybe as a curious experiment, but never to rely on them for a decent harvest.
Try some normal photoperiod, feminised plants next time, you will certainly harvest much more and more easily. Same knowledge and learning from this grow can be applied to photo/fems, the only thing really different is the lighting schedule.... veg 18/6..... flower 12/12. Hope this helps.... Organoman.
OOPS... damaged egos....
Cue the howls of outrage from all the auto flowering disciples!!