Should I put comma after the words "successfully developed" in this sentence?

Question:------------------
Ladies and Gentlemen, for your information, this OSS program is not only developed in Banda Aceh but also in some other regencies /municipalities in Indonesia. Through this PROMIS project implemented by TAF, 15 OSS have been successfully developed, out of the targeted 30 OSS by 2008.

Answers:
I don't know what an OSS is, but if I would use another work like cars, I would say: "15 cars have been successfully developed out of the targeted 30." I was taught that you only use a comma if you are going to pause at that point during reading it.

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